| 单词 | optic tract |
| 释义 | > as lemmasoptic tract optic tract n. Anatomy the part of either optic nerve pathway between the optic chiasma and the brain. ΚΠ 1848 R. Dunglison Med. Lexicon (ed. 7) 606/1 Optic nerve, Immediately after their origin the optic tracts proceed forwards. 1925 Science 18 Sept. 256/1 The action of organic arsenicals upon the optic tract. 1989 C. R. Legg Issues in Psychobiol. (BNC) 59 The optic tract projects to a number of anatomically distinct regions in the brainstem. optic tract spec. (a) Anatomy. The whole extent of an organ or system of organs, as the alimentary or digestive tract, or a continuous longitudinal structure, such as one strand or division of a nerve-cord; esp. applied to particular regions of the brain or spinal cord, as the olfactory tract, optic tract, pyramidal tract, etc. Cf. fibre tract n. at fibre n. Compounds 2. (b) Ornithology. A feathered area of the skin of a bird (= pteryla n.), as distinguished from a featherless space.extracted from tractn.3< as lemmas |
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