api gravity scale

API grav·i·ty scale

A a

Definition of api gravity scale words

noun api gravity scale the American Petroleum Institute gravity scale: a universally accepted scale of the relative density of fluids that is used in fuel technology and is measured in degrees API. One degree API is equal to (141.5/d)–131.5, where d = relative density at 288.7K 3

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A common word. It’s meaning is known to most children of preschool age. About 90% of English native speakers know the meaning and use the word.

Most Europeans know this English word. The frequency of it’s usage is somewhere between "mom" and "screwdriver".

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