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subthreshold

[ suhb-thresh-ohld, -thresh-hohld ]
/ sʌbˈθrɛʃ oʊld, -ˈθrɛʃ hoʊld /
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adjective Psychology, Physiology.
(of a stimulus) too weak to produce a response.
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QUIZ YOURSELF ON "IS" VS. "ARE"
"Is" it time for a new quiz? "Are" you ready? Then prove your excellent skills on using "is" vs. "are."
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IS and ARE are both forms of which verb?

Origin of subthreshold

First recorded in 1940–45; sub- + threshold
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2022
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