| DEXAMPHETAMINE | • dexamphetamine n. Dextroamphetamine. • DEXAMPHETAMINE n. the dextrorotatory isomer of amphetamine, used as a stimulant. |
| EXHAUSTIVENESS | • exhaustiveness n. The state of being exhaustive. • EXHAUSTIVE n. testing all possibilities or considering all elements. |
| EXHAUSTIVITIES | • exhaustivities n. Plural of exhaustivity. • EXHAUSTIVITY n. the state of being exhaustive. |
| EXOTHERMICALLY | • exothermically adv. In an exothermic manner. • EXOTHERMIC adv. of a chemical reaction, giving out heat, also EXOTHERMAL. |
| EXTINGUISHABLE | • extinguishable adj. Able to be extinguished. • EXTINGUISHABLE adj. that can be extinguished. |
| EXTRAVEHICULAR | • extravehicular adj. Relating to, on happening in, the space outside a vehicle, especially a spacecraft in space. • extra-vehicular adj. Alternative spelling of extravehicular. • EXTRAVEHICULAR adj. taking place outside a vehicle (as a spacecraft). |
| HEXACTINELLIDS | • hexactinellids n. Plural of hexactinellid. • HEXACTINELLID n. a kind of six-rayed sponge. |
| HEXAMETHONIUMS | • hexamethoniums n. Plural of hexamethonium. • HEXAMETHONIUM n. either of two compounds used as ganglionic blocking agents in the treatment of hypertension. |
| HEXOSAMINIDASE | • hexosaminidase n. (Biochemistry) Any enzyme that catalyzes the hydrolysis of terminal hexosamine residues in hexosaminides. • HEXOSAMINIDASE n. either of two hydrolytic enzymes that catalyze the splitting off of a hexose from a ganglioside and are deficient in some metabolic diseases. |
| HYPERCATALEXIS | • hypercatalexis n. (Poetry) The addition of one or two syllables to the last foot of a verse. • HYPERCATALEXIS n. the state of being hypercatalectic. |
| HYPEREXCITABLE | • hyperexcitable adj. Unusually or excessively excitable. • HYPEREXCITABLE adj. excessively excitable. |
| HYPERPROSEXIAS | • HYPERPROSEXIA n. abnormal powers of perception, as in Australian aboriginal trackers. |
| HYPERSEXUALITY | • hypersexuality n. The desire for sexual activity at levels high enough to be considered clinically significant. • HYPERSEXUALITY n. the state of being hypersexual. |
| LEXICOGRAPHERS | • lexicographers n. Plural of lexicographer. • LEXICOGRAPHER n. an author or editor of a dictionary. |
| LEXICOGRAPHIES | • lexicographies n. Plural of lexicography. • LEXICOGRAPHY n. the editing or making of a dictionary. |
| METHYLXANTHINE | • methylxanthine n. (Organic chemistry) Any of a group of compounds, such as caffeine, formed through the methylation of xanthines. • METHYLXANTHINE n. a methylated xanthine derivative, such as caffeine, theobromine, or theophylline. |
| XANTHOPTERINES | • XANTHOPTERINE n. a yellow pigment obtainable from the wings of yellow butterflies and the urine of mammals, also XANTHOPTERIN. |