Glossary · Nouns · B
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TermTypeDefinitionClassificationsUpdated
Blood-Brain BarriernounMWEa mechanism that creates a barrier between brain tissues and circulating bloodverified
Blood-Oxygenation Level Dependent Functional Magnetic Resonance ImagingnounMWEfunctional magnetic resonance imaging that relies on intrinsic changes in hemoglobin oxygenationverified
Bloodhoundnouna breed of large powerful hound of European origin having very acute smell and used in trackingverified
Bloodlettingnounformerly used as a treatment to reduce excess blood (one of the four humors of medieval medicine)verified
Bloodrootnounperennial woodland native of North America having a red root and red sap and bearing a solitary lobed leaf and white flower in early spring and having acrid emetic propertiesverified
Bloodsuckernouncarnivorous or bloodsucking aquatic or terrestrial worms typically having a sucker at each endverified
Bloodwood TreenounMWEspiny shrub or small tree of Central America and West Indies having bipinnate leaves and racemes of small bright yellow flowers and yielding a hard brown or brownish-red heartwood used in preparing a black dyeverified
Blooming-Fool BegonianounMWEhybrid winter-blooming begonia grown for its many large pink flowersverified
Blowbacknounmisinformation resulting from the recirculation into the source country of disinformation previously planted abroad by that country's intelligence serviceverified
Blowballnounany of several herbs of the genus Taraxacum having long tap roots and deeply notched leaves and bright yellow flowers followed by fluffy seed ballsverified
Blowernounlarge aquatic carnivorous mammal with fin-like forelimbs no hind limbs, including: whalesverified
Blowfishnounany of numerous marine fishes whose elongated spiny body can inflate itself with water or air to form a globeverified
Blue AshnounMWEash of central and southern United States with bluish-green foliage and hard brown woodverified
Blue Cardinal FlowernounMWEtall erect and very leafy perennial herb of eastern North America having dense spikes of blue flowersverified
Blue ChipnounMWEa common stock of a nationally known company whose value and dividends are reliableverified
Blue CohoshnounMWEtall herb of eastern North America and Asia having blue berrylike fruit and a thick knotty rootstock formerly used medicinallyverified
Blue CurlsnounMWEany of several plants of the genus Trichostema having whorls of small blue flowersverified
Blue DaisynounMWEhairy South African or Australian subshrub that has daisylike flowers with blue raysverified
Blue EldernounMWEshrub or small tree of western United States having white flowers and blue berriesverified
Blue ElderberrynounMWEshrub or small tree of western United States having white flowers and blue berriesverified
Blue False IndigonounMWEwild indigo of the eastern United States having racemes of blue flowersverified
Blue FignounMWEAustralian tree having hard white timber and glossy green leaves with white flowers followed by one-seeded glossy blue fruitverified
Blue FlagnounMWEa common iris of the eastern United States having blue or blue-violet flowersverified
Blue GoosenounMWENorth American wild goose having dark plumage in summer but white in winterverified
Blue JeannounMWE(usually plural) close-fitting trousers of heavy denim for manual work or casual wearverified
Blue JetnounMWEatmospheric discharges (lasting 10 msec) bursting from the tops of giant storm clouds in blue cones that widen as they flash upwardverified