acrosome reactions 《英文msh詞典》Acrosome Reactions ; [入口詞] Acrosome Reactions ; [主題詞] Acrosome Reaction ; [英文釋義] Changes that occur to liberate the enzymes of the ACROSOME of a sperm (SPERMATOZOA). Acrosome reaction allows the sperm to penetrate the ZONA PELLUCIDA and enter the OVUM during FERTILIZATION.