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1. Denoting a compound of arsenic with a valence of +3.
2. Arsenic (adj.).
References in periodicals archive ?
When the contaminant is arsenic in a precipitated form of arsenous sulfide, levels of arsenic measured in physical solids samples removed from treated sections decline over a period of time.
Between then and 1955, arsenic (as the sodium salt of arsenous acid) was widely used on the NSW north coast and along the NSW--Queensland border.
2008) because arsenous acid (the predominant form of arsenic in flooded rice paddies) is indistinguishable from silicic acid to the rice plant.