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acrolith
acromegaly
acromion
acronym
acropetal
acrophobia
Acropolis
acropolis
acrosome
across
across mike
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acrylamide
acrylate
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acrosome
ac·ro·some [ ákrə sm ] (plural ac·ro·somes)


noun 
Definition:
 
structure in sperm cell: a structure at the end of a sperm cell that releases enzymes to digest the cell membrane of an egg, enabling the sperm to penetrate the egg
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