Noun
animal pole (plural animal poles)
(embryology) The hemisphere of the blastula which eventually gives rise to the three germ layers and is composed of small cells that are in a state of rapid division.
The fourth division occurs mainly in blastomeres in the animal pole, which divide transversally as well as equally to make eight blastomeres. Source: Internet
The third cleavage is equal and equatorial so that the embryo has four blastomeres both in the vegetal and the animal pole. Source: Internet