say it: an-tee-TAHK-suhn
antitoxin is a noun meaning "an antibody that can neutralize a specific toxin". It carries one recorded sense.
an antibody that can neutralize a specific toxin
Forms marked · are formed by the regular rule rather than recorded in the source data. English keeps a few hundred irregulars and the rest follow the pattern, so the rule is right far more often than not — but it is a rule, and the mark says so.
Definitions, synonyms and semantic relations for antitoxin come from Princeton University’s WordNet. The pronunciation comes from the CMU Pronouncing Dictionary. Commonness is measured against a corpus of everyday English. Full sources and licences.