| HEMIHEDRON | • hemihedron n. (Crystallography) A solid hemihedrally derived. • HEMIHEDRON n. a solid derived in a hemihedral way, such as a tetrahedron. |
| HEXAHEDRON | • hexahedron n. (Geometry) A polyhedron with six faces. The regular hexahedron is the cube, and is one of the Platonic solids. • HEXAHEDRON n. a solid body of six sides or faces. |
| HOARHOUNDS | • hoarhounds n. Plural of hoarhound. • HOARHOUND n. a kind of wild flower, also HOREHOUND. |
| HOLOHEDRON | • holohedron n. A holohedral crystal. • HOLOHEDRON n. a geometrical form possessing the property of holohedrism. |
| HOREHOUNDS | • horehounds n. Plural of horehound. • HOREHOUND n. a kind of wild flower, also HOARHOUND. |
| HORNYHEADS | • hornyheads n. Plural of hornyhead. • HORNYHEAD n. a North American river chub. |
| HYDROPHANE | • hydrophane n. (Mineralogy) A semitranslucent variety of opal that becomes translucent or transparent on immersion in water. • HYDROPHANE n. a semitranslucent variety of opal that becomes translucent or transparent on immersion in water. |
| HYDROPHONE | • hydrophone n. A transducer that converts underwater sound waves into electrical signals, rather like a microphone. • HYDROPHONE n. an apparatus for listening to sounds conveyed by water. |
| ORPHANHOOD | • orphanhood n. The state of being an orphan; the losing of both parents through their death. • ORPHANHOOD n. the state of being an orphan, also ORPHANISM. |
| RHODOPHANE | • rhodophane n. (Biochemistry) The red pigment in the inner segments of the cones of the retina in animals. • RHODOPHANE n. the red pigment contained in the inner segments of the cones of the retina in animals. |
| SHOEHORNED | • shoehorned v. Simple past tense and past participle of shoehorn. • shoe-horned v. Simple past tense and past participle of shoe-horn. • SHOEHORN v. to force into a small space. |
| SHORTHANDS | • shorthands n. Plural of shorthand. • shorthands v. Third-person singular simple present indicative form of shorthand. • short-hands n. Plural of short-hand (alternative form of shorthands). |
| THORNHEDGE | • THORNHEDGE n. a hedge of hawthorn. |