acrosome(redirected from acrosomal cap)
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A caplike structure at the anterior end of a spermatozoon that produces enzymes aiding in egg penetration.
ac′ro·so′mal (-sō′məl) adj.
(Physiology) a cap-like structure on the tip of a spermatozoon that releases enzymes on encountering the ovum allowing fusion with the ovum in the sexual reproductive process; this part of the process is known as the acrosome reaction
[C19: from acro- + -some3]
an organelle covering the head of animal sperm and containing enzymes that digest the egg cell coating, thus permitting the sperm to enter the egg.
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|Noun||1.||acrosome - a process at the anterior end of a sperm cell that produces enzymes to facilitate penetration of the egg|
sperm, sperm cell, spermatozoan, spermatozoon - the male reproductive cell; the male gamete; "a sperm is mostly a nucleus surrounded by little other cellular material"