noun ·Rare ·Advanced level

Definitions

Noun

1. 1
   A biologically inactive precursor to the endocrine hormone insulin. uncountable

   "Meronym: proinsulin"

Etymology

By surface analysis, prepro- + insulin, or, by surface analysis, pre- + proinsulin.

Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.