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Glossary · Nouns · T

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TermTypeDefinitionClassificationsUpdated
Thiazinenouna compound made up of a ring of four carbon atoms and one sulfur atom and one nitrogen atomverifiedMay 18, 2026
Thick SkinnounMWEskin that is very thick (as an elephant or rhinoceros)verifiedMay 18, 2026
Thick-Billed MurrenounMWEa variety of murreverifiedMay 18, 2026
Thick-Kneenounlarge-headed large-eyed crepuscular or nocturnal shorebird of the Old World and tropical America having a thickened knee jointverifiedMay 18, 2026
Thickenernounany material used to thickenverifiedMay 18, 2026
Thicketnounsomething so dense as to be impenetrableverifiedMay 18, 2026
ThickheadnounAustralian and southeastern Asian birds with a melodious whistling callverifiedMay 18, 2026
Thicknessnounthe dimension through an object as opposed to its length or widthverifiedMay 18, 2026
Thiefnouna criminal who takes property belonging to someone else with the intention of keeping it or selling itverifiedMay 18, 2026
Thieverynounthe act of taking something from someone unlawfullyverifiedMay 18, 2026
Thievishnessnounhaving a disposition to stealverifiedMay 18, 2026
Thighnounthe part of the leg between the hip and the kneeverifiedMay 18, 2026
Thigh BootnounMWEa very high bootverifiedMay 18, 2026
Thigh PadnounMWEprotective garment consisting of a pad worn over the thighs by football playersverifiedMay 18, 2026
Thigh-Slappernouna joke that seems extremely funnyverifiedMay 18, 2026
Thighbonenounthe longest and thickest bone of the human skeleton, found in the upper part of the legverifiedMay 18, 2026
Thillnounone of two shafts extending from the body of a cart or carriage on either side of the animal that pulls itverifiedMay 18, 2026
Thimblenouna small metal cap to protect the finger while sewingverifiedMay 18, 2026
Thimbleberrynounshrubby raspberry of eastern North America having showy rose to purplish flowers and red or orange thimble-shaped fruitverifiedMay 18, 2026
Thimblefulnounas much as a thimble will holdverifiedMay 18, 2026
Thimblerignouna swindling sleight-of-hand gameverifiedMay 18, 2026
Thimbleweednouna common North American anemone with cylindrical fruit clusters resembling thimblesverifiedMay 18, 2026
Thimerosalnouna light-colored crystalline powder (trade name Merthiolate) used as a surgical antisepticverifiedMay 18, 2026
Thin AirnounMWEnowhere to be found in a giant voidverifiedMay 18, 2026
Thin-Leaved BilberrynounMWEerect blueberry of western United States having solitary flowers and somewhat sour berriesverifiedMay 18, 2026
Thin-Shelled MusselnounMWEmussel with thin fragile shells having only rudimentary hinge teethverifiedMay 18, 2026
Thingnounany attribute or quality considered as having its own existenceverifiedMay 18, 2026
Thing-In-Itselfnounthe intellectual conception of a thing as it is in itself, not as it is known through perceptionverifiedMay 18, 2026
Thingamabobnounsomething unspecified whose name is either forgotten or not knownverifiedMay 18, 2026
Thingamajignounsomething unspecified whose name is either forgotten or not knownverifiedMay 18, 2026
Thingmabobnounsomething unspecified whose name is either forgotten or not knownverifiedMay 18, 2026
Thingmajignounsomething unspecified whose name is either forgotten or not knownverifiedMay 18, 2026
Thingumabobnounsomething unspecified whose name is either forgotten or not knownverifiedMay 18, 2026
Thingumajignounsomething unspecified whose name is either forgotten or not knownverifiedMay 18, 2026
Thingummynounsomething unspecified whose name is either forgotten or not knownverifiedMay 18, 2026
Think FactorynounMWEa company that does research for hire and issues reports on the implicationsverifiedMay 18, 2026
Think PiecenounMWEan article in a newspaper or magazine or journal that represents opinions and ideas and discussion rather than bare factsverifiedMay 18, 2026
Think TanknounMWEa company that does research for hire and issues reports on the implicationsverifiedMay 18, 2026
Thinkernounsomeone who exercises the mind (usually in an effort to reach a decision)verifiedMay 18, 2026
Thinking CapnounMWEa state in which one thinksverifiedMay 18, 2026
Thinnernouna diluting agentverifiedMay 18, 2026
Thinnessnounrelatively small dimension through an object as opposed to its length or widthverifiedMay 18, 2026
Thinningnounthe act of diluting somethingverifiedMay 18, 2026
Thinning ShearsnounMWEshears with one serrate bladeverifiedMay 18, 2026
Thiobacillusnounsmall rod-shaped bacteria living in sewage or soil and oxidizing sulfurverifiedMay 18, 2026
Thiobacterianounany bacterium of the genus ThiobacillusverifiedMay 18, 2026
Thiocyanatenouna salt of thiocyanic acidverifiedMay 18, 2026
Thiocyanic AcidnounMWEan unstable acid that can be obtained by distilling a thiocyanate saltverifiedMay 18, 2026
Thiodiphenylaminenouna compound used primarily in veterinary medicine to rid farm animals of internal parasitesverifiedMay 18, 2026
Thioguaninenounan antineoplastic drug used to treat acute leukemiasverifiedMay 18, 2026
Thiopentalnounbarbiturate that is a hygroscopic powder (trade name Pentothal) that is a strong barbiturate that acts rapidlyverifiedMay 18, 2026
Thiopental SodiumnounMWEbarbiturate that is a hygroscopic powder (trade name Pentothal) that is a strong barbiturate that acts rapidlyverifiedMay 18, 2026
Thiopentobarbital SodiumnounMWEbarbiturate that is a hygroscopic powder (trade name Pentothal) that is a strong barbiturate that acts rapidlyverifiedMay 18, 2026
Thioridazinenouna tranquilizer (trade name Mellaril) used to treat schizophrenia and other psychotic disordersverifiedMay 18, 2026
Thiotepanounan antineoplastic drug used to treat certain malignanciesverifiedMay 18, 2026
Thiothixenenouna tranquilizer (trade name Navane) used to treat schizophreniaverifiedMay 18, 2026
Thiouracilnoundepresses the function of the thyroid glandverifiedMay 18, 2026
Third BasenounMWEthe fielding position of the player on a baseball team who is stationed near the third of the bases in the infield (counting counterclockwise from home plate)verifiedMay 18, 2026
Third BasemannounMWE(baseball) the person who plays third baseverifiedMay 18, 2026
Third Battle of YpresnounMWEbattle in World War I (1917)verifiedMay 18, 2026
Third ClassnounMWEmail consisting of printed matter qualifying for reduced postal ratesverifiedMay 18, 2026
Third Cranial NervenounMWEsupplies extrinsic muscles of the eyeverifiedMay 18, 2026
Third DecknounMWEthe deck below the main deckverifiedMay 18, 2026
Third DegreenounMWEinterrogation often accompanied by torture to extort information or a confessionverifiedMay 18, 2026
Third DimensionnounMWEthe dimension whereby a solid object differs from a two-dimensional drawing of itverifiedMay 18, 2026
Third EstatenounMWEthe common peopleverifiedMay 18, 2026
Third EyenounMWEa sensory structure capable of light reception located on the dorsal side of the diencephalon in various reptilesverifiedMay 18, 2026
Third EyelidnounMWEa protective fold of skin in the eyes of reptiles and birds and some mammalsverifiedMay 18, 2026
Third HousenounMWEa group of people who try actively to influence legislationverifiedMay 18, 2026
Third Law of MotionnounMWEaction and reaction are equal and oppositeverifiedMay 18, 2026
Third Law of ThermodynamicsnounMWElaw stating that the entropy of a substance approaches zero as its temperature approaches absolute zeroverifiedMay 18, 2026
third partynounMWEA person or group besides the two primarily involved in a situation, agreement, business, etc.IdentityMay 13, 2026
third party and supply chain managementnounMWESupply chain management is the oversight of materials, information, and finances as they move in a process from supplier to manufacturer to wholesaler to retailer to consumer. Supply chain management involves coordinating and integrating these flows both within and among companies, i.e., Third Parties. Third party management is the process whereby companies monitor and manage interactions with all external parties with which it has a relationship.ProcessRegulatedMay 9, 2026
third party contractnounMWEMeans a contract or purchase order awarded by the Recipient or subrecipient to a vendor or contractor.RequirementConfidentialMay 9, 2026
third party dependencynounMWEA third party that may have no interest in an organization's project or operations, but can can have an impact on them.RequirementRegulatedMay 12, 2026
third party managementnounMWEAn arrangement where a company will assume the day-to-day management of a property or package of properties it does not own for another company or institution in return for a fee.ProcessRegulatedMay 9, 2026
third party management policynounMWEThe guidelines and rules on how an organization should to direct and supervise business activities and relations with a third party.RequirementRegulatedMay 12, 2026
third party risk assessmentnounMWEThe process of identifying and determining the risk associated to a specific third party.ProcessInternalMay 12, 2026
Third Party Service ProvidernounMWEAs defined in the PCI DSS and PA-DSS Glossary of Terms, Abbreviations, and Acronyms, a service provider is a business entity that is not a payment brand, directly involved in the processing, storage, or transmission of cardholder data on behalf of another entity. This also includes companies that provide services that control or could impact the security of cardholder data. There are many types of businesses that could fall into the category of “service provider,” dependent on the services provided. Most commonly, a TPSP could be a legally separate entity; but it can also be a separate business unit or component of the entity under assessment—for example, an internal service provider—where the provider is outside the direct management control of the entity assessed.OrganizationRegulatedPCIMay 9, 2026
Third Party Service Provider ListnounMWEThis record contains lists of all third party service providers and their contacts within each organization.ArtifactInternalMay 12, 2026
Third PersonnounMWEpronouns and verbs that are used to refer to something other than the speaker or addressee of the language in which they occurverifiedMay 18, 2026
Third PowernounMWEthe product of three equal termsverifiedMay 18, 2026
Third RailnounMWEa rail through which electric current is supplied to an electric locomotiveverifiedMay 18, 2026
Third StomachnounMWEthe third compartment of the stomach of a ruminantverifiedMay 18, 2026
Third TonsilnounMWEa collection of lymphatic tissue in the throat behind the uvula (on the posterior wall and roof of the nasopharynx)verifiedMay 18, 2026
Third TrimesternounMWEtime period extending from the 28th week of gestation until deliveryverifiedMay 18, 2026
Third VentriclenounMWEa narrow ventricle in the midplane below the corpus callosumverifiedMay 18, 2026
Third-Class MailnounMWEmail consisting of printed matter qualifying for reduced postal ratesverifiedMay 18, 2026
Third-Degree BurnnounMWEburn characterized by destruction of both epidermis and dermisverifiedMay 18, 2026
Third-Dimensionalitynounthe property of having three dimensionsverifiedMay 18, 2026
Third-party relationshipnounMWEAny business arrangement between a financial institution and another entity, by contract or otherwise.ProcessRegulatedMay 12, 2026
Third-party sendernounMWEA special subset of a technology service provider that is authorized to transmit ACH files on behalf of an originator. Typically, the ODFI must rely upon warranties by the third- party sender regarding the originators' identity and credit worthiness, which places additional risks on the ODFI.IdentityRegulatedMay 12, 2026
Third-party service provider (ACH)nounMWEA third party, other than the ODFI or RDFI, that performs any function on behalf of the ODFI or the RDFI related to ACH processing. These functions would include the creation and sending of ACH files or acting as a sending or receiving point on behalf of a participating depository financial institution.OrganizationRegulatedPCIMay 12, 2026
Third-Place FinishnounMWEa finish in third place (as in a race)verifiedMay 18, 2026
Third-Raternounone who is third-rate or distinctly inferiorverifiedMay 18, 2026
Thirst for KnowledgenounMWEcuriosity that motivates investigation and studyverifiedMay 18, 2026
Thirsternouna person with a strong desire for somethingverifiedMay 18, 2026
Thirstinessnouna deficiency of moisture, especially when resulting from a permanent absence of rainfallverifiedMay 18, 2026
Thirty-Second NotenounMWEa musical note having the time value of a thirty-second of a whole noteverifiedMay 18, 2026
Thirty-Somethingnounthe time of life between 30 and 40verifiedMay 18, 2026