| CYCADOPHYTES | • cycadophytes n. Plural of cycadophyte. • CYCADOPHYTE n. any of a division of usually unbranched mostly extinct gymnosperms. |
| DASYPHYLLOUS | • dasyphyllous adj. (Botany, rare) Having downy leaves. • DASYPHYLLOUS adj. having crowded, thick or woolly leaves. |
| HYDROCEPHALY | • hydrocephaly n. Hydrocephalus. • HYDROCEPHALY n. an accumulation of serous fluid within the cranial cavity, also HYDROCEPHALUS. |
| HYDROPHYTONS | • HYDROPHYTON n. the coenosarc of a hydroid colony. |
| HYDROPHYTOUS | • hydrophytous adj. Relating to hydrophytes. • hydrophytous adj. Relating to hydrophytons. • HYDROPHYTOUS adj. like a hydrophyte, also HYDROPHYTIC. |
| HYDROTHERAPY | • hydrotherapy n. (Alternative medicine) Any of various techniques that use water, either externally or internally, for… • HYDROTHERAPY n. therapy involving the use of water. |
| HYPERACIDITY | • hyperacidity n. The condition of being excessively acidic. • HYPERACIDITY n. the condition of containing more than the normal amount of acid. |
| HYPERDACTYLY | • hyperdactyly n. (Pathology) polydactyly. • HYPERDACTYLY n. the state of having more than five fingers and toes. |
| HYPERTHYROID | • hyperthyroid adj. Of or pertaining to hyperthyroidism. • HYPERTHYROID n. one affected with hyperthyroidism. |
| HYPOCYCLOIDS | • hypocycloids n. Plural of hypocycloid. • HYPOCYCLOID n. a curve generated by a point on the circumference of a circle which rolls on the inside of another circle. |
| HYPODIPLOIDY | • hypodiploidy n. The state of being hypodiploid; hypoploidy in diploid organisms (including humans). • HYPODIPLOIDY n. the state of being hypodiploid, having slightly fewer than the diploid number of chromosomes. |
| HYPOTHYROIDS | • HYPOTHYROID n. someone suffering from hypothyroidism. |
| POLYPHYODONT | • polyphyodont n. Any animal whose teeth are continuously replaced. • POLYPHYODONT adj. having more than two successive dentitions. |
| SULPHHYDRYLS | • sulphhydryls n. Plural of sulphhydryl. • SULPHHYDRYL n. a chemical group, SH, characteristic of sulphur-containing compounds, also SULFHYDRYL. |
| TYROGLYPHIDS | • TYROGLYPHID n. a mite of the genus Tyroglyphus, including the cheesemite and the flour-mite. |