animal pole

from The American Heritage® Dictionary of the English Language, 5th Edition.

• noun The portion of an egg that is opposite the vegetal pole, that contains the nucleus and most of the cytoplasm, and from which polar bodies are extruded during maturation.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun embryology The hemisphere of the blastula which eventually gives rise to the three germ layers and is comprised of small cells that are in a state of rapid division.