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early 15c., "removal;" 1520s, "rooting out, eradication," from Latin extirpationem/exstirpationem (nominative extirpatio/exstirpatio), noun of action from past participle stem of extirpare/exstirpare "root out," from ex- "out" (see ex-) + stirps (genitive stirpis) "a root, stock of a tree."
extirpation ex·tir·pa·tion (ěk'stər-pā'shən)
The surgical removal of an organ, a part of an organ, or a diseased tissue.