noun ·Rare ·Advanced level

Definitions

Noun

1. 1
   An enzyme that catalyzes the conversion of iron(II) state, Fe²⁺ to iron(III) state, Fe³⁺. uncountable

Etymology

From Hephaestus + -in, after the god of metalworking.

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