[proh-in-suh-lin, -ins-yuh-]

Origin of proinsulin

First recorded in 1915–20; pro-1 + insulin Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

proinsulin in Medicine


  1. A single-chain polypeptide that is the precursor of insulin, converted into insulin by enzymatic action.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.