Definitions
from The Century Dictionary.
- noun Cell-substance of an ovum surrounding the nucleus.
from the GNU version of the Collaborative International Dictionary of English.
- adjective (Biol.) The protoplasmic matter which surrounds the entoblast, or cell nucleus, and undergoes segmentation.
from Wiktionary, Creative Commons Attribution/Share-Alike License.
- noun biology The
protoplasmic matter which surrounds theentoblast , or cell nucleus, and undergoessegmentation .
Etymologies
from Wiktionary, Creative Commons Attribution/Share-Alike License
peri- + -blast
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Examples
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A first cleavage of the stem-cell (cytula), B division of same into four segmentation-cells (only two visible), C the germinal disk divides into the blastoderm (b) and the periblast (p). d nutritive yelk, f fat-globule, c ovolemma, z space between the ovolemma and the ovum, filled with a clear fluid.)
The Evolution of Man — Volume 1 Ernst Heinrich Philipp August Haeckel 1876
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