say it: AY-bee-see
abc is a noun meaning "the elementary stages of any subject (usually plural)". It carries one recorded sense.
the elementary stages of any subject (usually plural)
“he mastered only the rudiments of geometry”
plural
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 abc 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.