olig-, oligo-

(Greek: prefix; scanty, little, meager, tiny, infrequent; abnormally few or small)

Scanty urine excretion.

It may occur in acute renal failure, dehydration, shock, congestive heart failure, and urinary tract obstruction in the urethra, in bilateral ureteral obstruction, or in unilateral renal obstruction if only one kidney is functional.

Related "few, small, less, little" word units: micro-; mini-; mio-, meio-; nano-.