| ARCHAEOPTERYXES | • archaeopteryxes n. Plural of archaeopteryx. • ARCHAEOPTERYX n. a Jurassic fossil bird of the Archaeopteryx genus, with a long bony tail, sharp-toothed jaws, and wings bearing three clawed digits. |
| BENZANTHRACENES | • benzanthracenes n. Plural of benzanthracene. • BENZANTHRACENE n. a crystalline carcinogenic cyclic hydrocarbon that is found in small amounts in coal tar. |
| CLEARHEADEDNESS | • clearheadedness n. The quality of being clearheaded. • clear-headedness n. The state of being clear-headed. • CLEARHEADED n. having or showing a clear understanding. |
| HAEMACYTOMETERS | • haemacytometers n. Plural of haemacytometer. • HAEMACYTOMETER n. an apparatus for counting the number of cells in a quantity of blood, typically consisting of a graduated pipette for drawing and diluting, also HEMACYTOMETER. |
| HENDECASYLLABLE | • hendecasyllable n. (Chiefly prosody) A line, verse, or word that comprises eleven syllables. • HENDECASYLLABLE n. a metrical line of eleven syllables. |
| HEXACHLORETHANE | • hexachlorethane n. Alternative form of hexachloroethane. • HEXACHLORETHANE n. a toxic crystalline compound used in smoke bombs. |
| INTERCHANGEABLE | • interchangeable adj. Freely substitutable; that may be swapped at will. • interchangeable adj. Following each other in alternate succession; alternating. • interchangeable n. Anything that can be interchanged; a substitute. |
| KAFFEEKLATSCHES | • kaffeeklatsches n. Plural of kaffeeklatsch. • KAFFEEKLATSCH n. (German) an informal social gathering for coffee and talk, also KLATCH, KLATSCH. |
| MACRENCEPHALIES | • MACRENCEPHALY n. the condition of having an abnormally large brain, also MACRENCEPHALIA, MACROCEPHALIA. |
| MEGALOCEPHALIES | • MEGALOCEPHALY n. the condition of having an unusually large head or cranial capacity, also MEGACEPHALY. |
| MESATICEPHALIES | • MESATICEPHALY n. the state of being mesaticephalic. |
| METATHEORETICAL | • metatheoretical adj. Of or pertaining to metatheory, the theory of theories. • METATHEORETICAL adj. relating to metatheory. |
| PREANAESTHETICS | • preanaesthetics n. Plural of preanaesthetic. • PREANAESTHETIC n. a drug administered prior to an anaesthetic, also PREANESTHETIC. |
| TEACHABLENESSES | • teachablenesses n. Plural of teachableness. • TEACHABLENESS n. the state of being teachable. |
| UNCHALLENGEABLE | • unchallengeable adj. Not open to challenge; indisputable. • UNCHALLENGEABLE adj. not challengeable. |
| UNTEACHABLENESS | • unteachableness n. The quality of being unteachable. • UNTEACHABLENESS n. the state of being unteachable. |