| 释义 |
‖ prestomium, præ-|priːˈstɒmɪəm|
[mod.L., f. pre- B. 3 + Gr. στόµιον, dim. of στόµα mouth.]
The anterior segment of the head of an annelid, bearing the eyes and tentacles. Hence preˈstomial a., of or pertaining to the prestomium.
1877Huxley Anat. Inv. Anim. v. 232 The peristomium and the praestomium together are ordinarily confounded under the common term of ‘head’. Ibid., The praestomial tentacle is similar in structure to an ordinary cirrus. |