| BATHYSPHERES | • bathyspheres n. Plural of bathysphere. • BATHYSPHERE n. a submersible observation chamber. |
| CHRYSOPHYTES | • chrysophytes n. Plural of chrysophyte. • CHRYSOPHYTE n. a type of golden-brown alga. |
| DYSRHYTHMIAS | • dysrhythmias n. Plural of dysrhythmia, which can refer to types of dysrhythmia, cases of dysrhythmia, or episodes of dysrhythmia. • DYSRHYTHMIA n. an abnormal rhythm. |
| DYSRHYTHMICS | • DYSRHYTHMIC n. someone suffering from dysrhythmia. |
| EURHYTHMISTS | • EURHYTHMIST n. a practitioner of eurhythmics, also EURYTHMIST. |
| HELICHRYSUMS | • helichrysums n. Plural of helichrysum. • HELICHRYSUM n. a genus of composite plants, the flowers of which keep their colour and shape when dried. |
| HYDROSPHERES | • hydrospheres n. Plural of hydrosphere. • HYDROSPHERE n. the water of the earth. |
| HYGROCHASIES | • HYGROCHASY n. dehiscence on moistening. |
| HYPERSTHENES | • hypersthenes n. Plural of hypersthene. • HYPERSTHENE n. a rock-forming orthorhombic silicate of magnesium and ferrous iron. |
| HYPOSTROPHES | • hypostrophes n. Plural of hypostrophe. • HYPOSTROPHE n. a return to the primary argument after digression. |
| HYPOTHESISER | • hypothesiser n. Alternative form of hypothesizer. • HYPOTHESISER n. one who hypothesises, also HYPOTHESIZER. |
| HYPSOCHROMES | • HYPSOCHROME n. a shift to a shorter wavelength in the absorption spectrum of a compound. |
| ICHTHYOSAURS | • ichthyosaurs n. Plural of ichthyosaur. • ICHTHYOSAUR n. a large fossil marine reptile, also ICHTHYOSAURIAN, ICHTHYOSAURUS. |
| PSYCHOGRAPHS | • psychographs n. Plural of psychograph. • psychographs v. Third-person singular simple present indicative form of psychograph. • PSYCHOGRAPH n. a photographic image attributed to a supernatural or spiritualistic cause. |
| SHELLFISHERY | • shellfishery n. A place where shellfish are caught or processed. • shellfishery n. (Uncountable) The catching of shellfish. • SHELLFISHERY n. a commercially exploited population of shellfish. |
| SULPHHYDRYLS | • sulphhydryls n. Plural of sulphhydryl. • SULPHHYDRYL n. a chemical group, SH, characteristic of sulphur-containing compounds, also SULFHYDRYL. |
| SYNCHROFLASH | • synchroflash n. (Photography, chiefly attributive) synchronization of the flash and shutter of a camera. • SYNCHROFLASH n. a mechanism which synchronizes the opening of a camera shutter with the peak of brilliance of a flash bulb. |