hyposulfurous

[hahy-puh-suhl-fyoo r-uh s, -suhl-fer-uh s]
Also hydrosulfurous, hy·po·sul·phur·ous.

Origin of hyposulfurous

First recorded in 1810–20; hypo- + sulfurous
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018