| 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. |
| CYANOACETYLENES | • cyanoacetylenes n. Plural of cyanoacetylene. • CYANOACETYLENE n. a large and complex organic molecule found in interstellar clouds. |
| ELECTROANALYSES | • electroanalyses n. Plural of electroanalysis. • ELECTROANALYSIS n. electrochemical analysis. |
| 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. |
| HYPERAESTHESIAS | • hyperaesthesias n. Plural of hyperaesthesia. • HYPERAESTHESIA n. excessive sensitivity, also HYPERESTHESIA. |
| MEGAGAMETOPHYTE | • megagametophyte n. (Biology) Any gametophyte that develops from a megaspore. • megagametophyte n. (Biology) A female gametophyte. • MEGAGAMETOPHYTE n. the gametophyte developing vegetatively from the megaspore of a heterosporous plant. |
| METAGENETICALLY | • metagenetically adv. In a metagenetic manner. • METAGENETIC adv. relating to metagenesis. |
| QUATERCENTENARY | • quatercentenary n. A four-hundredth anniversary. • QUATERCENTENARY n. a four-hundredth anniversary. |
| TEMPERAMENTALLY | • temperamentally adv. In a temperamental manner. • temperamentally adv. (Not comparable) By one’s temperament. • TEMPERAMENTAL adv. relating to temperament. |
| TETRAETHYLLEADS | • tetraethyl␣leads n. Plural of tetraethyl lead. • TETRAETHYLLEAD n. a colourless oily insoluble liquid formerly used in petrol to prevent knocking. |
| TETRAMETHYLLEAD | • tetramethyllead n. (Organic chemistry) A compound with chemical formula C4H12Pb, used as an antiknock additive for gasoline. • TETRAMETHYLLEAD n. a volatile poisonous liquid used esp. formerly as an antiknock agent. |