<biology> A granule within the young sperm cell (a spermatid) that eventually becomes the acrosome or caplike frontal portion of the mature sperm cell. ... (13 Nov 1997) ... 
(ak´ro-blast) Golgi material in the spermatid from which the acrosome develops.
Type: Term Pronunciation: ak′rō-blast Definitions: 1. Component of the developing spermatid composed of numerous Golgi elements; it contains the proacrosomal granules.
acroblast A body in the spermatid from which arises the acrosome.