ablactation (n.)

"weaning of a child," 1650s, from Latin ablactationem (nominative ablactatio) "weaning," noun of action from past participle stem of ablactare "to wean," from ab "off, away from" (see ab-) + lactare "to suckle," from lac (genitive lactis) "milk" (from PIE root *g(a)lag- "milk").

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