English Etymology From in- + frigid + -ant. Noun infrigidant (plural infrigidants) (obsolete) A medical agent or substance which produces a feeling of cold when applied to the body. Antonyms calefacient Latin Verb īnfrīgidant third-person plural present active indicative of īnfrīgidōWikiwand - on Seamless Wikipedia browsing. On steroids.Remove ads