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Glossary · Nouns · R

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TermTypeDefinitionClassificationsUpdated
Red Dwarf StarnounMWEa small, old, relatively cool starverifiedMay 18, 2026
Red EftnounMWEred terrestrial form of a common North American newtverifiedMay 18, 2026
Red ElmnounMWENorth American elm having rough leaves that are red when openingverifiedMay 18, 2026
Red False MallownounMWEfalse mallow of western United States having racemose red flowersverifiedMay 18, 2026
Red FirenounMWEcombustible material (usually salts of lithium or strontium) that burns bright redverifiedMay 18, 2026
Red FlagnounMWEsomething that irritates or demands immediate actionverifiedMay 18, 2026
Red FoxnounMWEweedy annual with spikes of silver-white flowersverifiedMay 18, 2026
Red GiantnounMWEa large, old, luminous starverifiedMay 18, 2026
Red Giant StarnounMWEa large, old, luminous starverifiedMay 18, 2026
Red GingernounMWEan ornamental ginger native to Pacific islandsverifiedMay 18, 2026
Red GoatfishnounMWEbody bright scarlet with 2 yellow to reddish strips on sideverifiedMay 18, 2026
Red GoosefootnounMWEherb considered fatal to swineverifiedMay 18, 2026
Red GramnounMWEtropical woody herb with showy yellow flowers and flat podsverifiedMay 18, 2026
Red GrousenounMWEreddish-brown grouse of upland moors of Great BritainverifiedMay 18, 2026
Red GumnounMWEreddish-brown dried gummy exudation from any of several trees of the genus Eucalyptus especially Eucalyptus camaldulensisverifiedMay 18, 2026
Red HawnounMWEAmerican red-fruited hawthorn with stems and leaves densely covered with short woolly hairsverifiedMay 18, 2026
Red HeatnounMWEthe heat or the color of fireverifiedMay 18, 2026
Red HelleborinenounMWEorchid of Mediterranean and Asia having a lax spike of bright rose-pink flowersverifiedMay 18, 2026
Red HerringnounMWEany diversion intended to distract attention from the main issueverifiedMay 18, 2026
Red HotnounMWEa frankfurter served hot on a bunverifiedMay 18, 2026
Red InknounMWEthe amount by which the cost of a business exceeds its revenueverifiedMay 18, 2026
Red Jungle FowlnounMWEa jungle fowl of southeastern Asia that is considered ancestral to the domestic fowlverifiedMay 18, 2026
Red JunipernounMWEsmall juniper found east of Rocky Mountains having a conic crown, brown bark that peels in shreds, and small sharp needlesverifiedMay 18, 2026
Red KaurinounMWENew Zealand tree with glossy leaves and scaly reddish-brown barkverifiedMay 18, 2026
Red LauannounMWEhard heavy red wood of the red lauan treeverifiedMay 18, 2026
Red Lauan TreenounMWEvaluable Philippine timber treeverifiedMay 18, 2026
Red LavernounMWEedible red seaweedsverifiedMay 18, 2026
Red LeadnounMWEa reddish oxide of lead (Pb3O4) used as a pigment in paints and in glass and ceramicsverifiedMay 18, 2026
Red LightnounMWEa cautionary sign of dangerverifiedMay 18, 2026
Red LinenounMWEa line that is colored red and that bisects an ice hockey rinkverifiedMay 18, 2026
Red MannounMWEoffensive term for Native AmericansverifiedMay 18, 2026
Red MaplenounMWEmaple of eastern and central AmericaverifiedMay 18, 2026
Red MarrownounMWEbone marrow of children and some adult bones that is required for the formation of red blood cellsverifiedMay 18, 2026
Red MeatnounMWEmeat that is dark in color before cooking (as beef, venison, lamb, mutton)verifiedMay 18, 2026
Red Morning-GlorynounMWEannual herb having scarlet flowersverifiedMay 18, 2026
Red MulberrynounMWENorth American mulberry having dark purple edible fruitverifiedMay 18, 2026
Red MulletnounMWEbrightly colored tropical fishes with chin barbelsverifiedMay 18, 2026
Red NoticenounMWEan Interpol notice describing a wanted person and asking that he or she be arrested with a view to extraditionverifiedMay 18, 2026
Red OaknounMWEany of numerous American oaks having 4 stamens in each floret, acorns requiring two years to mature and leaf veins usually extending beyond the leaf margin to form points or bristlesverifiedMay 18, 2026
Red OnionnounMWEflat mild onion having purplish tunicsverifiedMay 18, 2026
Red OsiernounMWEcommon North American shrub with reddish purple twigs and white flowersverifiedMay 18, 2026
Red Osier DogwoodnounMWEcommon North American shrub with reddish purple twigs and white flowersverifiedMay 18, 2026
Red PandanounMWEreddish-brown Old World raccoon-like carnivoreverifiedMay 18, 2026
Red PeppernounMWEground pods and seeds of pungent red peppers of the genus CapsicumverifiedMay 18, 2026
Red PeriwinklenounMWEcommonly cultivated Old World woody herb having large pinkish to red flowersverifiedMay 18, 2026
Red PhalaropenounMWEphalarope of northern oceans and lakesverifiedMay 18, 2026
Red PimpernelnounMWEherb with scarlet or white or purple blossoms that close at approach of rainy weatherverifiedMay 18, 2026
Red PinenounMWEpine of eastern North America having long needles in bunches of two and reddish barkverifiedMay 18, 2026
Red PorgynounMWEfood fish of the Mediterranean and Atlantic coasts of Europe and AmericaverifiedMay 18, 2026
Red RaspberrynounMWEany of several raspberries bearing red fruitverifiedMay 18, 2026
Red Rat SnakenounMWElarge harmless snake of southeastern United StatesverifiedMay 18, 2026
Red RegionnounMWEa place of eternal fire envisaged as punishment for the damnedverifiedMay 18, 2026
Red RockfishnounMWEa large fish of the Pacific coast of North AmericaverifiedMay 18, 2026
Red SalmonnounMWEfatty red flesh of salmon of Pacific coast and riversverifiedMay 18, 2026
Red SandalwoodnounMWEtree of India and East Indies yielding a hard fragrant timber prized for cabinetwork and dark red heartwood used as a dyewoodverifiedMay 18, 2026
Red SandersnounMWEtree of India and East Indies yielding a hard fragrant timber prized for cabinetwork and dark red heartwood used as a dyewoodverifiedMay 18, 2026
Red SanderswoodnounMWEtree of India and East Indies yielding a hard fragrant timber prized for cabinetwork and dark red heartwood used as a dyewoodverifiedMay 18, 2026
Red SaundersnounMWEtree of India and East Indies yielding a hard fragrant timber prized for cabinetwork and dark red heartwood used as a dyewoodverifiedMay 18, 2026
Red ScarenounMWEa period of general fear of communistsverifiedMay 18, 2026
Red SetternounMWEan Irish breed with a chestnut-brown or mahogany-red coatverifiedMay 18, 2026
Red ShiftnounMWEa shift in the electromagnetic radiation of a distant object toward longer wavelengths, the red end of the spectrumverifiedMay 18, 2026
Red Shrubby PenstemonnounMWElow branching dark green shrub with bunches of brick-red flowers at ends of branchesverifiedMay 18, 2026
Red SignalnounMWEAny electronic emission (e.g., plain text, key, key stream, subkey stream, initial fill, or control signal) that would divulge national security information if recovered.VulnerabilityRegulatedCUIMay 9, 2026
Red Silk CottonnounMWEa plant fiber from the red silk-cotton tree of eastern IndiaverifiedMay 18, 2026
Red Silk-Cotton TreenounMWEEast Indian silk cotton tree yielding fibers inferior to kapokverifiedMay 18, 2026
Red Silver FirnounMWEmedium to tall fir of western North America having a conic crown and branches in tiersverifiedMay 18, 2026
Red SiskinnounMWESouth American species of scarlet finch with black head and wings and tailverifiedMay 18, 2026
Red SnappernounMWEhighly esteemed reddish lean flesh of snapper from Atlantic coast and Gulf of MexicoverifiedMay 18, 2026
Red SorrelnounMWEEast Indian sparsely prickly annual herb or perennial subshrub widely cultivated for its fleshy calyxes used in tarts and jelly and for its bast fiberverifiedMay 18, 2026
Red SpidernounMWEsmall web-spinning miteverifiedMay 18, 2026
Red Spider MitenounMWEsmall web-spinning miteverifiedMay 18, 2026
Red SpritesnounMWEatmospheric electricity (lasting 10 msec) appearing as globular flashes of red (pink to blood-red) light rising to heights of 60 miles (sometimes seen together with elves)verifiedMay 18, 2026
Red SprucenounMWEmedium-sized spruce of eastern North AmericaverifiedMay 18, 2026
Red SquirrelnounMWEcommon reddish-brown squirrel of Europe and parts of AsiaverifiedMay 18, 2026
Red TapenounMWEneedlessly time-consuming procedureverifiedMay 18, 2026
Red TeamnounMWEA group of people authorized and organized to emulate a potential adversary’s attack or exploitation capabilities against an enterprise’s security posture. The Red Team’s objective is to improve enterprise Information Assurance by demonstrating the impacts of successful attacks and by demonstrating what works for the defenders (i.e., the Blue Team) in an operational environment.RoleMay 12, 2026
Red Team exercisenounMWEAn exercise, reflecting real-world conditions, that is conducted as a simulated adversarial attempt to compromise organizational missions and/or business processes to provide a comprehensive assessment of the security capability of the information system and organization.ProcessRestrictedMay 12, 2026
Red TidenounMWEseawater that is discolored by large numbers of certain dinoflagellates that produce saxitoxinverifiedMay 18, 2026
Red TrilliumnounMWEtrillium of eastern North America having malodorous pink to purple flowers and an astringent root used in folk medicine especially to ease childbirthverifiedMay 18, 2026
Red UnderwingnounMWEmoth having dull forewings and red-marked hind wingsverifiedMay 18, 2026
Red ValeriannounMWEEuropean herb with small fragrant crimson or white spurred flowersverifiedMay 18, 2026
Red WaternounMWEa disease of cattleverifiedMay 18, 2026
Red WillownounMWEEurasian osier having reddish or purple twigs and bark rich in tanninverifiedMay 18, 2026
Red WinenounMWEwine having a red color derived from skins of dark-colored grapesverifiedMay 18, 2026
Red WolfnounMWEreddish-grey wolf of southwestern North AmericaverifiedMay 18, 2026
Red WormnounMWEterrestrial worm that burrows into and helps aerate soilverifiedMay 18, 2026
Red-Backed LemmingnounMWEOld World lemmingverifiedMay 18, 2026
Red-Backed MousenounMWEany of several voles of mountainous regions of Eurasia and AmericaverifiedMay 18, 2026
Red-Backed SandpipernounMWEsmall common sandpiper that breeds in northern or Arctic regions and winters in southern United States or Mediterranean regionsverifiedMay 18, 2026
Red-Bellied SnakenounMWEharmless woodland snake of southeastern United StatesverifiedMay 18, 2026
Red-Bellied TerrapinnounMWEfreshwater turtle of Chesapeake Bay tributaries having red markings on the lower shellverifiedMay 18, 2026
Red-Bellied TurtlenounMWEfreshwater turtle of Chesapeake Bay tributaries having red markings on the lower shellverifiedMay 18, 2026
Red-Berried EldernounMWEcommon North American shrub or small treeverifiedMay 18, 2026
Red-Blindnessnoundichromacy characterized by lowered sensitivity to long wavelengths of light resulting in an inability to distinguish red and purplish blueverifiedMay 18, 2026
Red-Breasted MergansernounMWEwidely distributed merganser of America and EuropeverifiedMay 18, 2026
Red-Breasted NuthatchnounMWEbluish-grey nuthatch with reddish breastverifiedMay 18, 2026
Red-Breasted SapsuckernounMWEwestern North American sapsuckerverifiedMay 18, 2026
Red-Breasted SnipenounMWEa dowitcher with a red breastverifiedMay 18, 2026
Red-Eyed VireonounMWEof northern North America having red irises and an olive-grey body with white underpartsverifiedMay 18, 2026
Red-Flowered Silky OaknounMWEtall shrub with cylindrical racemes of red flowers and pinnatifid leaves silky and grey beneathverifiedMay 18, 2026