segmentation

As a noun segmentation

is the act or an instance of dividing into segments.

As an adjective amphiblastic is

segmenting unequally; said of telolecithal ova with complete segmentation.

As a noun segmentation

is the act or an instance of dividing into segments.

As an adjective ectolecithal is

having the food yolk, at the commencement of segmentation, in a peripheral position, and the cleavage process confined to the centre of the egg.