tonsillectomy (n.)

c. 1600, from Latin tonsillae, tosillae (plural) "tonsils," diminutive of toles "goiter," which is perhaps of Gaulish origin. Related: Tonsils.

word-forming element meaning "surgical removal," from Latinized form of Greek -ektomia "a cutting out of," from ektemnein "to cut out," from ek "out" (see ex-) + temnein "to cut" (from PIE root *tem- "to cut").