Vas

google

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late 16th century: from Latin, literally ‘vessel’.

wiktionary

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Borrowed from Latin vas(“vessel”), from 1645–1655.

etymonline

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vas (n.)

in anatomy, "a tube, duct, or conduit for conveying blood, lymph, semen, etc.," plural vasa, Latin, literally "vessel." Vas deferens (plural vasa defferentia) is from 1570s.