arsenous acid

noun

Chemistry.

1. a hypothetical acid, H 3 AsO 3 or HAsO 2 , found only in solution or in the form of its salts.

2. arsenic trioxide.

Word History and Origins

Origin of arsenous acid¹

First recorded in 1790–1800

Example Sentences

The most effective treatment that the writer has ever used is the following formula recommended by Dr. Law: Arsenous acid one dram, sulfate of iron five drams, powdered areca nut two ounces, common salt four ounces.

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