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单词 pre-anal
释义

> as lemmas

pre-anal
pre-anal adj. and n.
Brit. /(ˌ)priːˈeɪnl/
,
U.S. /ˌpriˈeɪn(ə)l/
Zoology (a) adj. situated in front of the anus; (b) n. (in reptiles) a scale situated in front of the anus.
ΚΠ
1843 Philos. Trans. (Royal Soc.) 133 279 In Scolopendra alternans, Leach, and S. Hardwickei, Nob., there are two short and small chambers of the heart in the last dorsal, or preanal segment of the body.
1864 A. C. L. G. Günther Reptiles Brit. India 15 Præanals about as long as abdominals.
1897 T. C. Allbutt et al. Syst. Med. II. 1034 The four pairs of pre-anal and three pairs of post-anal papillæ on the tail of the male.
1924 J. Kiær Downtonian Fauna of Norway 69 The anal opening must have been situated in this space. The spine can therefore be called the preanal spine.
1949 Amer. Midland Naturalist 41 582 Transverse ventral rows are counted along the mid-ventral line from the first chin shields to the preanals, exclusive.
1995 E. W. Knight-Jones et al. in P. J. Hayward & J. S. Ryland Handbk. Marine Fauna N.W. Europe vi. 203/1 Bristle worms... Parapods of five pre-anal segments lack chaetae.
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