| 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. |
| HOPLOLOGISTS | • hoplologists n. Plural of hoplologist. • HOPLOLOGIST n. a student of hoplology, the study of weapons. |
| HOSPITALLERS | • hospitallers n. Plural of hospitaller. • HOSPITALLER n. a member of a charitable brotherhood for the care of the sick in hospitals, also HOSPITALER. |
| LITHOPHILOUS | • lithophilous adj. (Biology) That lives in stony or rocky environments. • LITHOPHILOUS adj. living among stones. |
| LYMPHOBLASTS | • lymphoblasts n. Plural of lymphoblast. • LYMPHOBLAST n. an abnormal cell, the production of which is linked to lymphoblastic leukaemia. |
| PHILOLOGISTS | • philologists n. Plural of philologist. • PHILOLOGIST n. a person who studies or has knowledge of philology, also PHILOLOGER, PHILOLOGIAN, PHILOLOGUE. |
| 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. |
| SEPTILLIONTH | • septillionth adj. The ordinal form of the number septillion. • septillionth n. The person or thing in the septillionth position. • septillionth n. One of a septillion equal parts of a whole. |
| 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. |
| TYPHLOLOGIES | • TYPHLOLOGY n. the study of blindness and the blind. |
| XANTHOPHYLLS | • xanthophylls n. Plural of xanthophyll. • XANTHOPHYLL n. a yellow carotenoid pigment found with chlorophyll in green plants and in egg yolks, also XANTHOPHYL. |