Noun
vegetal pole (plural vegetal poles)
(embryology) The hemisphere of the blastula opposite to the animal pole comprising large yolk cells dividing at a slower rate that eventually differentiate into the extraembryonic membranes.
The first cleavage occurs from the animal to the vegetal pole and usually is equal though very often can also be unequal. Source: Internet
The second cleavage to reach the embryos four cell stage also occurs from the animal to the vegetal pole in an approximately equal fashion though like the first cleavage it’s possible to have an unequal division. Source: Internet