noun ·Rare ·Advanced level

Definitions

Noun

1. 1
   The application of a protective coating of phosphate to the surface of metals (usually steels); various types exist; the coating is often black or gray. uncountable, usually

   "Near-synonym: blackening"

Synonyms

All synonyms

blackening

Etymology

From phosphate + -ing.

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