| 单词 | alimentary or digestive tract |
| 释义 | > as lemmasalimentary or digestive 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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