- cacodyl, tetramethyldiarsine - a poisonous oily liquid with a garlicky odor composed of 2 cacodyl groups; undergoes spontaneous combustion in dry air
--1 is a kind of organic compound
- cacodyl, cacodyl group, cacodyl radical, arsenic group - the univalent group derived from arsine
--2 is a kind of group, radical, chemical group