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单词 mesoplastral
释义

mesoplastraladj.

Brit. /ˌmɛsə(ʊ)ˈplastr(ə)l/, U.S. /ˌmɛzoʊˈplæstr(ə)l/; see also meso- comb. form.
Origin: Formed within English, by compounding. Etymons: meso- comb. form, plastral adj.
Etymology: < meso- comb. form + plastral adj. Compare xiphiplastral adj. and n. at xiphiplastron n. Derivatives and mesoplastron n.
Zoology.
Designating a bone which forms the mesoplastron (of a turtle).
ΚΠ
1889 Nature 2 May 7/1 In the Pleurodira the first two families are distinguished from one another by the presence or absence of a mesoplastral bone.
1954 Breviora No. 32. 3 Further preparation of E[mys] conybearii..revealed the presence of small lateral mesoplastral bones as in..Pelomedusa.
1986 T. R. Halliday & K. Adler Encycl. Reptiles & Amphibians 85/2 Family: Chelidae..Body form: distinguished by biconvex 5th and 8th cervical vertebrae; shell without mesoplastral bones.
This entry has been updated (OED Third Edition, September 2001; most recently modified version published online March 2022).
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adj.1889
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