Term Name:	acrosomal vesicle
Synonyms:	acrosomal granule, acrosome
Definition:	A structure in the head of a spermatozoon that contains acid hydrolases, and is concerned with the breakdown of the outer membrane of the ovum during fertilization. It lies just beneath the plasma membrane and is derived from the lysosome.
Ontology:	GO: Cellular Component [GO:0001669]    QuickGO    AmiGO