Uncus
L. uncus = a hook. Applied to several hook-shaped structures in the brain.
Ureter
Gr. outeter, from ouron = urne, and the suffix -ter, denoting the instrument. Applied to the upper urinary canal.
Ursodeoxycholic acid
L. urso = bear. The active ingredient in Ursodiol (ursodeoxycholic acid) was first found in bear bile. source
Ursodeoxycholic acid
L. ursidae = bears (taxonomical family) Ursodeoxycholic acid is a bile acid found in the bile of bears (Ursidae) as a conjugate with taurine. Used therapeutically, it prevents the synthesis…
Uterus
L. uterus = womb. Its relationship to uter = bag of goat skin, has been suggested.
Vaccine
From L. vaccinus, from vacca = ‘cow’ (because of the early use of the cowpox virus against smallpox). source