| 释义 |
perisome Zool.|ˈpɛrɪsəʊm|
Also perisom; also in L. form perisoma |pɛrɪˈsəʊmə|.
[= mod.F. périsome, and mod.L. perisōma, f. Gr. περί about + σῶµα body.]
The integument or body-wall of an echinoderm, upon which the external calcareous skeleton is developed. Hence periˈsomal, perisoˈmatic, periˈsomial adjs., of or pertaining to the perisome.
1872Nicholson Palæont. 102 The class Echinodermata..is distinguished by the fact that the external envelope of the body (‘perisome’) has the power of secreting calcareous matter to a greater or less extent. 1877Huxley Anat. Inv. Anim. viii. 513 The genus Stylifer, which infests Star-fishes and Sea-urchins, sometimes imbedding itself in the perisoma. 1877W. Thomson Voy. Challenger I. iii. 172 The perisom is divided into four muscular bands. 1877Huxley Anat. Inv. Anim. ix. 594 Portions of the perisomatic skeleton of the aboral region. 1893Syd. Soc. Lex., Perisomal,..Perisomatic,..Perisomial. |
