| 释义 |
periblastic, a. Embryol.|pɛrɪˈblæstɪk|
[f. as prec. + -ic.]
a. In Haeckel's nomenclature, Applied to a meroblastic ovum which germinates by segmentation of the superficial part, becoming successively a perimonerula, pericytula, perimorula, periblastula, and perigastrula.
1876Lankester in Q. Jrnl. Microsc. Sc. XVI. 62 The periblastic mode of development is most common in the Arthropods, in Tracheata as well as Crustacea;..The essential point about the periblastic type is this, that the food-material collects at an early stage of development centrally, so as to be completely enveloped by the formative protoplasm.
b. Of or pertaining to the periblast (see prec. b).
1889H. V. Wilson (as above) 216 They [the marginal cells] are even marked off from the surrounding periblastic protoplasm. |