(of gasoline) boiling at a relatively low temperature.
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Origin of high-test
First recorded in 1955–60
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
Examples from the Web for high-test
Then the motor roared and he and the engineer, took off at double the speed she could make on high-test gas.The Sky Is Falling|Lester del Rey
It was mid-afternoon before the "Winged Arrow" was towed across to the dock and her tanks refilled with high-test gasoline.Tom Swift and His Giant Telescope|Victor Appleton
Relating to highly volatile high-octane gasoline.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.