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shaft horsepower

American

noun

the horsepower delivered to the driving shaft of an engine, as measured by a torsion meter. shp, SHP

Etymology

Origin of shaft horsepower

First recorded in 1905–10

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.