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resection (n.)

1610s, "action of cutting off or away," from Latin resectionem (nominative resectio), noun of action from past-participle stem of resecare "cut off, cut loose" (see resect). The surgical sense of "excision of some part," of a bone, etc., (1775) seems to be the sole surviving one.

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Definitions of resection from WordNet

resection (n.)
surgical removal of part of a structure or organ;
From wordnet.princeton.edu