Vascular

google

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late 17th century: from modern Latin vascularis, from Latin vasculum (see vasculum).

wiktionary

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From New Latin vasculāris, from Latin vasculum, diminutive of vas(“vessel”). [1]

etymonline

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vascular (adj.)

1670s, in anatomy, "pertaining to conveyance or circulation of fluids," from Modern Latin vascularis "of or pertaining to vessels or tubes," from Latin vasculum "a small vessel," diminutive of vas "vessel."