API donut (English, noun)
expansion: API donut (plural API donuts)
Senses:
topics: automotive
transport
vehicles
glosses: 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).
tags: US
Forms:
form: API donuts
tags: plural