gyration
UK /dʒaɪ(ə)ˈɹeɪʃ(ə)n/ · US /ˌd͡ʒaɪˈɹeɪʃ(ə)n/ noun
Forms gyrations
- noun (also figuratively) The act of turning or whirling, especially around a fixed axis or centre; a circular or spiral motion; rotation.
- noun (specifically, Euclidean geometry) A rotation around an axis which is not the centre of rotational symmetry; an eccentric or off-centre rotation.
- noun (conchology, countable) One of the whorls of a spiral univalve shell.
- noun (neurology) The arrangement of convolutions of gyri in the cerebral cortex of the brain.
Synonyms
circumvolution spinning wheeling rotation revolution whirling
Etymology
From gyre (“to spin around; to gyrate, to whirl; (rare) to make (something) spin or whirl around; to spin, to whirl”) + -ation (suffix indicating actions or processes). Gyre is from Late Middle English giren (“to turn (something) away; to cause (something) to revolve or rotate; to travel in a circle”), from Old French girer (“to turn”), and directly from its etymon Latin gȳrāre, the present active infinitive of gȳrō (“to turn in a circle, rotate; to circle or revolve around”) (from gȳrus (“circle; circular motion; circuit, course”), from Ancient Greek γῦρος (gûros, “a circle, a ring”), from Proto-Indo-European *gew- (“to bend; to curve”)) + -ō (suffix forming regular first-conjugation verbs).
Webster’s 1913
Sources: Wiktionary · WordNet 3.0 · Webster’s 1913 — from the Wiktionary entry “gyration”, CC BY-SA 4.0. Details