| 单词 | pentadactylism |
| 释义 | > as lemmaspentaˈdactylism pentaˈdactylism n. [originally after German Pentadactylie pentadactyly n.] now rare the state or condition of being pentadactyl. ΘΚΠ the world > life > the body > external parts of body > limb > digit > [noun] > having specific number of sexdigitism1775 polydactylism1865 pentadactylism1879 polydactyly1886 tetradactylity1891 pentadactyly1892 1879 tr. E. Haeckel Evol. Man II. 300 The original parent-form of the entire group had anteriorly and posteriorly five digits (Pentadactylism [Ger. Pentadactylie]). 1886 Encycl. Brit. XX. 454/2 The digital elements seem to indicate more than pentadactylism, as in the extinct Ichthyosauri. 1990 N.Y. Times 17 Apr. c11/1 The basic primitive mammal trend is toward pentadactylism... Even the horse's hoof and the deer's hoof are modified from five digits. < as lemmas |
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