from The Century Dictionary.
- noun In embryology, provided with very little and uniformly distributed food-yolk: a term applied to certain eggs, such as those of the sponges, sea-urchins, etc.
from the GNU version of the Collaborative International Dictionary of English.
- adjective (Biol.) Applied to those ova which segment uniformly, and which have little or no food yelk embedded in their protoplasm.
from Wiktionary, Creative Commons Attribution/Share-Alike License.
- adjective biology Tending to
segment uniformly, and having little or no yolkembedded in the protoplasm.
from The American Heritage® Dictionary of the English Language, 4th Edition
from Wiktionary, Creative Commons Attribution/Share-Alike License
Such an ovum as that of our present type, however being devoid of such yolk (alecithal = without yolk), necessitates a very early start in life, and, for reasons too complicated to state fully here, the development in such a case is considered particularly instructive and primitive by zoologists.
(alecithal), and, therefore, we find it dividing completely and almost equally.