viv·i·sec·tion (vĭv'ĭ-sěk'shən, vĭv'ĭ-sěk'-) n. The act or practice of cutting into or otherwise injuring living animals, especially for the purpose of scientific research.
[Latin vīvus, alive; see vivify + (dis)section.] viv'i·sec'tion·al adj., viv'i·sec'tion·al·ly adv., viv'i·sec'tion·ist n.