API donut
English
Etymology
From API + donut; from American Petroleum Institute, and its shape.
Pronunciation
- (Received Pronunciation) IPA(key): /ˌeɪpiːaɪ ˈdəʊnʌt/
- (General American) IPA(key): /ˌeɪpiaɪ ˈdoʊ(ˌ)nʌt/
- Rhymes: -əʊnʌt
- Hyphenation: API do‧nut
Noun
API donut (plural API donuts)
- (US, automotive) An information table found on cans of motor oil, conforming to U.S. standards, which indicates the weight (viscosity) and type of oil. The central circle provides the oil viscosity rating (ie. 10W50), while the upper annulus section provides the oil type (ie. SP).