Syllable division derived from spelling — this word is not in the pronouncing dictionary, so no phonetic transcription is shown rather than a guessed one.
ampere-second is a noun meaning "a unit of electrical charge equal to the amount of charge transferred by a current of 1 ampere in 1 second". It carries one recorded sense.
a unit of electrical charge equal to the amount of charge transferred by a current of 1 ampere in 1 second
Definitions, synonyms and semantic relations for ampere-second come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.