| 释义 |
‖ gyrus Anat.|ˈdʒaɪərəs|
Pl. gyri |ˈdʒaɪəraɪ|.
[L. = circle, circuit, career, a. Gr. γῦρος ring, circle.]
A convoluted ridge between grooves or sulci; esp. a convolution of the brain. (See also quot. 1846.)
1842Dunglison Med. Lex. (ed. 3) 339/2 Gyrus, anfractuosity, convolution. 1846Dana Zooph. (1848) 171 Gyri 4 to 5 lines broad. Ibid. Gloss., Gyrus, a trench together with the sides enclosing it; or, in massive species, the space between the middle of two ridges. 1859Owen Classif. Mammalia 25 The superficies [of the cerebrum] is folded into more or less numerous gyri or convolutions. 1876Trans. Clinical Soc. IX. 66 The third occipital gyrus. 1887Lancet 17 Sept. 586/2 The region of the angular gyrus..contains a centre for the raising of the upper eyelid of the opposite eye. |