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Syllable division derived from spelling — this word is not in the pronouncing dictionary, so no phonetic transcription is shown rather than a guessed one.
aec is a noun meaning "a former executive agency (from 1946 to 1974) that was responsible for research into atomic energy and its peacetime uses in the United States". It carries one recorded sense.
a former executive agency (from 1946 to 1974) that was responsible for research into atomic energy and its peacetime uses in the United States
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 aec come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.