noun ·Rare ·Advanced level

Definitions

Noun

1. 1
   The active material used in an inoculation; an inoculum
2. 2
   a substance (a virus or toxin or immune serum) that is introduced into the body to produce or increase immunity to a particular disease wordnet
3. 3
   An alloyant used to refine grains in a cast microstructure.

Synonyms

All synonyms

grain refinergrain refinerinoculumpreventive

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