ur-1

1.
variant of uro-1 :
uranalysis.

ur-2

1.
variant of uro-2. before a vowel:
urite.

ur-3

(sometimes initial capital letter)
1.
a combining form meaning “earliest, original,” used in words denoting the primal stage of a historical or cultural entity or phenomenon:
ur-civilization; urtext.
Origin
< German ur-, Middle High German, Old High German; cognate with Old English or-
British Dictionary definitions for ur-

ur-

combining form
1.
a variant of uro-1 , uro-2

Ur-

combining form
1.
original, primitive: Ursprache
Word Origin
German

uro-1

combining form
1.
indicating urine or the urinary tract: urochrome, urogenital, urolith, urology
Word Origin
from Greek ouron urine

uro-2

combining form
1.
indicating a tail: urochord, uropod, urostyle
Word Origin
from Greek oura
Word Origin and History for ur-

prefix meaning "original, earliest, primitive," from German; at first only in words borrowed from German (cf. ursprache "hypothetical primitive language"); since mid-20c. a living prefix in English. Cf. also Urschleim under protoplasm and Urquell under Pilsner.

ur- in Medicine

ur- pref.
Variant of uro-1.