| ANTHELIXES | • anthelixes n. Plural of anthelix. • ANTHELIX n. (Greek) the inner curved edge of the external ear. |
| HELIOTAXES | • HELIOTAXIS n. the response of an organism to the sun's rays. |
| ANTIHELIXES | • antihelixes n. Plural of antihelix. • ANTIHELIX n. the curved elevation of the cartilage of the ear, within or in front of the helix, also ANTHELIX. |
| EXHAUSTIBLE | • exhaustible adj. Capable of being exhausted. • EXHAUSTIBLE adj. capable of being exhausted. |
| EXHILARATES | • exhilarates v. Third-person singular simple present indicative form of exhilarate. • EXHILARATE v. to make cheerful and excited. |
| SIXTEENTHLY | • sixteenthly adv. In the sixteenth place; sixteenth in a row. • SIXTEENTH adv. number sixteen in sequence. |
| EXHAUSTIVELY | • exhaustively adv. In an exhaustive manner. • EXHAUSTIVE adv. testing all possibilities or considering all elements. |
| EXTREMOPHILES | • extremophiles n. Plural of extremophile. • EXTREMOPHILE n. an organism that lives under extreme environmental conditions. |
| INEXHAUSTIBLE | • inexhaustible adj. Impossible to exhaust; unlimited. • INEXHAUSTIBLE adj. not exhaustible. |
| EXTINGUISHABLE | • extinguishable adj. Able to be extinguished. • EXTINGUISHABLE adj. that can be extinguished. |
| HEXACTINELLIDS | • hexactinellids n. Plural of hexactinellid. • HEXACTINELLID n. a kind of six-rayed sponge. |
| 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. |
| HYPERSEXUALITY | • hypersexuality n. The desire for sexual activity at levels high enough to be considered clinically significant. • HYPERSEXUALITY n. the state of being hypersexual. |
| HETEROFLEXIBLES | • heteroflexibles n. Plural of heteroflexible. • HETEROFLEXIBLE n. one of flexible sexual orientation. |
| HETEROSEXUALITY | • heterosexuality n. The state of being sexually and romantically attracted primarily or exclusively to persons of the opposite sex. • heterosexuality n. Sexual activity with a person of the opposite sex. • HETEROSEXUALITY n. the state of being heterosexual. |
| HOMOSEXUALITIES | • homosexualities n. Plural of homosexuality. • HOMOSEXUALITY n. the state of being homosexual. |
| METHYLXANTHINES | • methylxanthines n. Plural of methylxanthine. • METHYLXANTHINE n. a methylated xanthine derivative, such as caffeine, theobromine, or theophylline. |