| HYDROPOLYPS | • hydropolyps n. Plural of hydropolyp. • HYDROPOLYP n. a hydrozoan polyp. |
| HYPERDACTYL | • HYPERDACTYL adj. having more than five fingers or toes. |
| HYPERLYDIAN | • HYPERLYDIAN adj. in Greek music, above the Lydian mode. |
| HYPERPLOIDY | • hyperploidy n. The condition of being hyperploid. • HYPERPLOIDY n. the state of being hyperploid, in excess of but not exact multiple of diploid. |
| HYPOCYCLOID | • hypocycloid n. (Geometry) The locus of a point on the circumference of a circle that rolls without slipping inside… • HYPOCYCLOID n. a curve generated by a point on the circumference of a circle which rolls on the inside of another circle. |
| PACHYDACTYL | • PACHYDACTYL adj. having thick digits, also PACHYDACTYLOUS. |
| POLYDACTYLS | • polydactyls n. Plural of polydactyl. • POLYDACTYL n. someone having too many fingers or toes. |
| POLYDACTYLY | • polydactyly n. (Teratology) A condition in which a person or animal has more than the usual number of digits (fingers… • POLYDACTYLY n. the state of being polydactyl, having too many fingers or toes. |
| POLYHYBRIDS | • polyhybrids n. Plural of polyhybrid. • POLYHYBRID n. a plant hybridised from many sources. |
| POLYHYDROXY | • polyhydroxy adj. (Organic chemistry) Having three or more hydroxy functional groups. • POLYHYDROXY adj. containing more than one hydroxyl group in the molecule. |
| PYRAMIDALLY | • pyramidally adv. Like a pyramid; in a pyramidal manner or shape. • PYRAMIDAL adv. shaped like a pyramid. |
| SULPHHYDRYL | • sulphhydryl n. Alternative spelling of sulfhydryl. • SULPHHYDRYL n. a chemical group, SH, characteristic of sulphur-containing compounds, also SULFHYDRYL. |
| SYMPODIALLY | • sympodially adv. (Botany) In a sympodial manner. • SYMPODIAL adv. relating to a sympodium, a stem involved in sympodial growth. |
| TYROGLYPHID | • TYROGLYPHID n. a mite of the genus Tyroglyphus, including the cheesemite and the flour-mite. |