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multigrade

adjective

mul·​ti·​grade ˌməl-tē-ˈgrād How to pronounce multigrade (audio)
-ˌtī-
1
: including or involving students from more than one grade level
a multigrade classroom
2
of motor oil : having a viscosity range that allows use over a wide temperature range
Due to the need for an oil that embodies both good lubrication at high temperatures and easy cranking in cold weather, multigrade oils have been developed. Basically, a multigrade oil is thinner at low temperatures and thicker at high temperatures. Kevin M. G. Maher et al.

Word History

First Known Use

1949, in the meaning defined at sense 1

Time Traveler
The first known use of multigrade was in 1949

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