FLEXION

flexion. Flexion, n. the act of bending, a cast, turn, joint

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Flex″ion (?), n. [[L. flexio: cf. F. flexion.]] 1. 1. The act of flexing or bending; a turning.
2. 2. A bending; a part bent; a fold. Bacon.
3. 3. (Gram.) Syntactical change of form of words, as by declension or conjugation; inflection.
Express the syntactical relations by flexion. Sir W. Hamilton. 4. 4. (Physiol.) The bending of a limb or joint; that motion of a joint which gives the distal member a continually decreasing angle with the axis of the proximal part; — distinguished from extension.