| HOBBYHORSES | • hobbyhorses n. Plural of hobbyhorse. • hobby-horses n. Plural of hobby-horse. • hobby␣horses n. Plural of hobby horse. |
| HOMOSTYLIES | • HOMOSTYLY n. in flowers, the existence of styles of only one length. |
| HOMOZYGOSES | • homozygoses n. Plural of homozygosis. • HOMOZYGOSIS n. the condition of being a homozygote. |
| HYDROSCOPES | • hydroscopes n. Plural of hydroscope. • HYDROSCOPE n. an instrument for viewing under water. |
| HYGROSCOPES | • hygroscopes n. Plural of hygroscope. • HYGROSCOPE n. an instrument for displaying changes in air humidity. |
| HYPOTYPOSES | • hypotyposes n. Plural of hypotyposis. • HYPOTYPOSIS n. a vivid description of a scene. |
| HYPSOPHOBES | • HYPSOPHOBE n. a person suffering from hypsophobia, a fear of falling from high places. |
| MYTHOPOESES | • mythopoeses n. Plural of mythopoesis. • MYTHOPOESIS n. the making of myths. |
| MYTHOPOESIS | • mythopoesis n. Creation of myth. • MYTHOPOESIS n. the making of myths. |
| OSTEOPHYTES | • osteophytes n. Plural of osteophyte. • OSTEOPHYTE n. an abnormal bony outgrowth. |
| PHOTOSYSTEM | • photosystem n. (Biochemistry) Either of two biochemical systems, active in chloroplasts, that are part of photosynthesis. • PHOTOSYSTEM n. either of two photochemical reaction centers consisting chiefly of photosynthetic pigments complexed with protein and occurring in chloroplasts. |
| SOOTHSAYERS | • soothsayers n. Plural of soothsayer. • SOOTHSAYER n. a person who predicts the future by magical, intuitive, or more rational means. |
| SPOROPHYTES | • sporophytes n. Plural of sporophyte. • SPOROPHYTE n. a spore-producing phase in plants that reproduce by metagenesis (alternating asexual and sexual reproduction). |
| STETHOSCOPY | • stethoscopy n. (Medicine) The diagnostic use of a stethoscope. • STETHOSCOPY n. examination with a stethoscope. |
| STYLOPHONES | • stylophones n. Plural of stylophone. • STYLOPHONE n. a type of battery-powered electronic instrument played with a steel-tipped pen-like stylus. |
| TYPHLOSOLES | • typhlosoles n. Plural of typhlosole. • TYPHLOSOLE n. a fold of the wall which projects into the cavity of the intestine in bivalve mollusks, certain annelids, starfishes, and some other animals. |