Definition from Wiktionary, the free dictionary
Named after the inventor, Roman Abt.
- (Received Pronunciation) IPA(key): /ɑːpt ˈsɪs.tm̩/, /æpt ˈsɪs.tm̩/
- (US) IPA(key): /ɑpt ˈsɪs.tm̩/, /æpt ˈsɪs.tm̩/
- (rail transport, usually capitalized) A rail system used in mountainous terrain with multiple cograils.