vivisection

/ˈvɪvɪsɛkʃən/

IPA: /V IH1 V IY0 S EH1 K SH AH0 N/

noun
  1. 1

    The action of cutting, surgery or other invasive treatment of a living organism for the purposes of physiological or pathological scientific investigation.

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Source: https://en.wiktionary.org/wiki/vivisection