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hypophosphorous

[hahy-puh-fos-fer-uh s, -fos-fawr-uh s, -fohr-]

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adjective

of or derived from hypophosphorous acid.

Origin of hypophosphorous

First recorded in 1810–20; hypo- + phosphorous

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for hypophosphorous

Historical Examples of hypophosphorous

This is freely soluble in hydrochloric and hypophosphorous acids.
Cooley's Practical Receipts, Volume II
Arnold Cooley