| HALFSERIOUSLY | • HALFSERIOUSLY adv. in a partially joking way. |
| HETEROCYSTOUS | • heterocystous adj. Having heterocysts. • HETEROCYSTOUS adj. of or like a heterocyst. |
| HETEROSTYLOUS | • heterostylous adj. Exhibiting heterostyly. • HETEROSTYLOUS adj. having styles of different length in different flowers, also HETEROSTYLED. |
| HYDROMEDUSANS | • HYDROMEDUSAN n. a hydromedusa, also HYDROMEDUSA, HYDROMEDUSOID. |
| HYPERAROUSALS | • hyperarousals n. Plural of hyperarousal. • HYPERAROUSAL n. a state of extreme arousal. |
| HYPERSURFACES | • hypersurfaces n. Plural of hypersurface. • HYPERSURFACE n. a figure that is the analogue in hyperspace of a surface in three-dimensional space. |
| HYSTERANTHOUS | • hysteranthous adj. (Botany) Having the leaves emerge after the flowers have opened. It typically refers to geophytes that… • HYSTERANTHOUS adj. having the leaves appearing after the flowers. |
| NEUROSYPHILIS | • neurosyphilis n. (Pathology) A syphilis infection affecting the nervous system. • NEUROSYPHILIS n. a syphilitic infection affecting the central nervous system. |
| OXYRHYNCHUSES | • OXYRHYNCHUS n. an Egyptian fish, sacred to the goddess Hathor, represented on coins and sculptures. |
| PSYCHOSURGEON | • psychosurgeon n. One who carries out psychosurgery. • PSYCHOSURGEON n. a practitioner of psychosurgery. |
| PSYCHOSURGERY | • psychosurgery n. (Surgery) Surgery of the brain to treat or alleviate mental illness. • PSYCHOSURGERY n. cerebral surgery employed in treating psychic symptoms. |
| PYROSULPHATES | • pyrosulphates n. Plural of pyrosulphate. • PYROSULPHATE n. a salt of sulphur. |
| SOUTHEASTERLY | • southeasterly adj. Situated in, or pointing to, the southeast. • southeasterly adj. (Chiefly of a wind) coming from the southeast. • southeasterly n. A strong wind or storm from the southeast. |
| SOUTHWESTERLY | • southwesterly adj. Situated in, or pointing to, the southwest. • southwesterly adj. (Chiefly of a wind) coming from the southwest. • southwesterly adv. From the southwest. |
| SULPHUREOUSLY | • sulphureously adv. Archaic form of sulfurously. • SULPHUREOUS adv. pertaining to or like sulphur, also SULFUREOUS. |
| SUPERHIGHWAYS | • superhighways n. Plural of superhighway. • SUPERHIGHWAY n. a multilane highway (as an expressway or turnpike) designed for high-speed traffic. |
| SUPERPHYSICAL | • superphysical adj. Above or beyond physics; not explainable by physical laws. • SUPERPHYSICAL adj. being above or beyond the physical world or explanation on physical principles. |
| SURVEYORSHIPS | • surveyorships n. Plural of surveyorship. • SURVEYORSHIP n. the office of surveyor. |