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acrylate resin
acrylic
acrylic acid
acrylic resin
acrylonitrile
ACT
act
act of contrition
act of faith
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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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