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early 17th century: from Latin inseminat- ‘sown’, from the verb inseminare, from in- ‘into’ + seminare ‘plant, sow’ (from semen, semin- ‘seed, semen’).
etymonline
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insemination (n.)
1650s, "action of sowing," noun of action from inseminate. Meaning "infusion of semen" is from 1854.
