acrosomen.

1899 J. H. McGregor in Jrnl. Morphol. 15 Suppl. 91 For this body in mammals Lenhossek proposed the term ‘Akrosom’, and throughout the present paper I shall call it the acrosome.

1899 J. H. McGregor in Jrnl. Morphol. 15 Suppl. 93 The attachment of acrosome to nucleus marks the anterior end of the spermatid from the start.

1951 G. H. Bourne Cytol. & Cell Physiol. (ed. 2) vi. 271 There is evidence..that the [Golgi] apparatus is associated with..the formation of fatty yolk in eggs, and of the acrosome in spermatozoa.

2005 Daily Tel. 22 June 11/1 Human sperm were more than three times more likely to lose their acrosomes—caps that enable them to penetrate eggs—within an hour when placed in contact with tiny doses of genistein in tests.

1929 Proc. Royal Soc. 1928–9 B. 104 319 Pro-acrosomic granules do not readily stain deeply in neutral-red.]

1930 Proc. Royal Soc. 1929–30 B. 105 433 This behaviour of the Golgi apparatus in precociously secreting the acrosomic granule while still floating in the cytoplasm, is unlike what takes place in Cavia.

1960 L. Picken Organization of Cells vi. 231 The ‘acrosomic system’ (that is, acrosome, head-cap, and precursors).

2002 Proc. National Acad. Sci. U.S.A. 99 11211/1 The nucleus changes shape during the subsequent acrosomic phase, which is followed by caudal migration of mitochondria during the maturation phase.