| ETHOLOGISTS | • ethologists n. Plural of ethologist. • ETHOLOGIST n. one who studies or writes upon ethology. |
| MONOTHEISTS | • monotheists n. Plural of monotheist. • MONOTHEIST n. one who believes that there is but one God. |
| ORTHOEPISTS | • orthoepists n. Plural of orthoepist. • orthoëpists n. Plural of orthoëpist. • ORTHOEPIST n. one who is skilled in orthoepy. |
| OSTEOPHYTES | • osteophytes n. Plural of osteophyte. • OSTEOPHYTE n. an abnormal bony outgrowth. |
| PHOTORESIST | • photoresist n. A light-sensitive film used in photolithography and photoengraving. • PHOTORESIST n. an organic material that polymerizes on exposure to ultraviolet light and in that form resists attack by acids and solvents. |
| PHOTOSYSTEM | • photosystem n. (Biochemistry) Either of two biochemical systems, active in chloroplasts, that are part of photosynthesis. • PHOTOSYSTEM n. either of two photochemical reaction centers consisting chiefly of photosynthetic pigments complexed with protein and occurring in chloroplasts. |
| SMOOTHPATES | • SMOOTHPATE n. (archaic) a bald person. |
| SOUTHERMOST | • southermost adj. Synonym of southernmost. • SOUTHERMOST adj. (obsolete) most southerly, also SOUTHERNMOST, SOUTHMOST. |
| STETHOSCOPE | • stethoscope n. (Medicine) A medical instrument used for listening to sounds produced within the body. • stethoscope v. (Transitive) To auscultate, or examine, with a stethoscope. • STETHOSCOPE n. an instrument with which to listen to the sounds produced by the heart, lungs, etc. |
| STETHOSCOPY | • stethoscopy n. (Medicine) The diagnostic use of a stethoscope. • STETHOSCOPY n. examination with a stethoscope. |
| THEOGONISTS | • theogonists n. Plural of theogonist. • THEOGONIST n. a writer on theogony. |
| THEOLOGISTS | • theologists n. Plural of theologist. • THEOLOGIST n. a theologian. |
| THEOSOPHIST | • theosophist n. An advocate of, or believer in theosophy. • THEOSOPHIST n. a believer in theosophy, immediate divine illumination or wisdom, also THEOSOPH, THEOSOPHER. |
| TOOTHFISHES | • toothfishes n. Plural of toothfish. • TOOTHFISH n. the Chilean sea bass. |
| TOOTHPASTES | • toothpastes n. Plural of toothpaste. • TOOTHPASTE n. a paste for cleaning the teeth. |
| TOOTHSHELLS | • toothshells n. Plural of toothshell. • tooth␣shells n. Plural of tooth shell. • TOOTHSHELL n. any species of Dentalium and allied genera having a tooth-shaped shell. |
| TOOTHWASHES | • toothwashes n. Plural of toothwash. • TOOTHWASH n. a liquid preparation for cleaning the teeth. |
| TOUCHSTONES | • touchstones n. Plural of touchstone. • Touchstones prop.n. Plural of Touchstone. • TOUCHSTONE n. a highly siliceous (usually black) stone or other stone for testing gold or silver by the colour of the mark each makes on it; (figurative) a criterion, a standard. |