| ALLOPATHISTS | • allopathists n. Plural of allopathist. • ALLOPATHIST n. one who practises allopathy, orthodox medical treatment, also ALLOPATH. |
| APOPHYLLITES | • apophyllites n. Plural of apophyllite. • APOPHYLLITE n. a mineral, hydrated calcium potassium silicate, that exfoliates on heating. |
| CHLOROPLASTS | • chloroplasts n. Plural of chloroplast. • CHLOROPLAST n. a plastid that contains chlorophyll and is the site of photosynthesis. |
| HOSPITALLERS | • hospitallers n. Plural of hospitaller. • HOSPITALLER n. a member of a charitable brotherhood for the care of the sick in hospitals, also HOSPITALER. |
| ITHYPHALLICS | • ithyphallics n. Plural of ithyphallic. • ITHYPHALLIC n. a poem in this metre. |
| LAMPLIGHTERS | • lamplighters n. Plural of lamplighter. • LAMPLIGHTER n. one whose job it is to light lamps. |
| LYMPHOBLASTS | • lymphoblasts n. Plural of lymphoblast. • LYMPHOBLAST n. an abnormal cell, the production of which is linked to lymphoblastic leukaemia. |
| PHANTASMALLY | • phantasmally adv. In a phantasmal manner. • PHANTASMAL adv. of the nature of a phantasm, also PHANTASMIC, PHANTASMICAL. |
| PHILATELISTS | • philatelists n. Plural of philatelist. • PHILATELIST n. a stamp collector. |
| PHOTOLYSABLE | • photolysable adj. Capable of photolysis. • PHOTOLYSABLE adj. capable of being photolysed, also PHOTOLYZABLE. |
| PHYLLOTAXIES | • phyllotaxies n. Plural of phyllotaxy. • PHYLLOTAXY n. the arrangement of leaves on a stem and in relation to one another, also PHYLLOTAXIS. |
| PLAINCLOTHES | • plainclothes adj. (Usually of a police officer) Wearing ordinary civilian clothes instead of a uniform, in order to avoid detection. • plainclothes n. Ordinary civilian clothes, rather than uniform. • plain-clothes adj. Alternative spelling of plain clothes when used attributively. |
| PROTHALLUSES | • prothalluses n. Plural of prothallus. • PROTHALLUS n. the free-living gametophyte of a fern or other vascular cryptogam, also PROTHALLIUM. |
| THALLOPHYTES | • thallophytes n. Plural of thallophyte. • THALLOPHYTE n. any organism belonging to the Thallophyta, that includes algae, fungi, and bacteria. |
| TROPHALLAXES | • trophallaxes n. Plural of trophallaxis. • TROPHALLAXIS n. mutual exchange of nutriment in symbiosis. |
| TROPHALLAXIS | • trophallaxis n. (Biology) The mutual exchange of (fluid) food between individuals, especially in social insects. • TROPHALLAXIS n. mutual exchange of nutriment in symbiosis. |
| WHIPSTALLING | • whipstalling v. Present participle of whipstall. • WHIPSTALL v. of an airplane, to stall causing the nose to whip forward and down. |
| XANTHOPHYLLS | • xanthophylls n. Plural of xanthophyll. • XANTHOPHYLL n. a yellow carotenoid pigment found with chlorophyll in green plants and in egg yolks, also XANTHOPHYL. |