| DESULPHURATIONS | • desulphurations n. Plural of desulphuration. • DESULPHURATION n. the act of desulphuring. |
| DRAUGHTSPERSONS | • draughtspersons n. Plural of draughtsperson. • DRAUGHTSPERSON n. a gender-neutral term for draughtsman or draughtswoman. |
| ELECTROPHORUSES | • electrophoruses n. Plural of electrophorus. • ELECTROPHORUS n. an apparatus consisting of a disk and metal plate to demonstrate static electricity. |
| HYPERFASTIDIOUS | • hyperfastidious adj. Extremely fastidious. • HYPERFASTIDIOUS adj. excessively fastidious. |
| MESATICEPHALOUS | • mesaticephalous adj. (Anatomy) mesaticephalic. • MESATICEPHALOUS adj. intermediate between dolichocephalic and brachycephalic, also MESATICEPHALIC. |
| MUSICOTHERAPIES | • MUSICOTHERAPY n. therapy involving the use of music. |
| OPENMOUTHEDNESS | • OPENMOUTHEDNESS n. the state of being openmouthed. |
| PHOTOLUMINESCES | • photoluminesces v. Third-person singular simple present indicative form of photoluminesce. • PHOTOLUMINESCE v. to produce photoluminescence. |
| PROSENCHYMATOUS | • prosenchymatous adj. Relating to the prosenchyma. • PROSENCHYMATOUS adj. relating to prosenchyma, supporting plant tissue containing little protoplasm. |
| PSEUDOARTHROSES | • pseudoarthroses n. Plural of pseudoarthrosis. • PSEUDOARTHROSIS n. a joint formed by fibrous tissue bridging the gap between the two fragments of bone of an old fracture that have not united, also PSEUDARTHROSIS. |
| PSEUDOARTHROSIS | • pseudoarthrosis n. Alternative form of pseudarthrosis. • PSEUDOARTHROSIS n. a joint formed by fibrous tissue bridging the gap between the two fragments of bone of an old fracture that have not united, also PSEUDARTHROSIS. |
| PSYCHONEUROTICS | • psychoneurotics n. Plural of psychoneurotic. • PSYCHONEUROTIC n. one suffering from a psychoneurosis. |
| PSYCHOSEXUALITY | • psychosexuality n. The psychological aspects of sexuality. • PSYCHOSEXUALITY n. the psychic factors of sex. |
| SUBSTRATOSPHERE | • substratosphere n. The area of the atmosphere directly below the stratosphere. • SUBSTRATOSPHERE n. the area of the atmosphere below the stratosphere. |
| SULPHATHIAZOLES | • sulphathiazoles n. Plural of sulphathiazole. • SULPHATHIAZOLE n. a sulphonamide formerly used in human medicine against staphylococcal infection (now only used in veterinary medicine), also SULFATHIAZOLE. |
| SULPHONMETHANES | • SULPHONMETHANE n. a colourless crystalline compound used medicinally as a hypnotic, also SULFONMETHANE. |
| SUPERPHOSPHATES | • superphosphates n. Plural of superphosphate. • SUPERPHOSPHATE n. acid phosphate. |
| UNSOPHISTICATED | • unsophisticated adj. Not sophisticated; lacking sophistication. • UNSOPHISTICATED adj. not sophisticated. |
| ZINJANTHROPUSES | • ZINJANTHROPUS n. a type of australopithecine, remains of which were discovered in the Olduvai Gorge in Tanzania in 1959. |