Synonyms/Hypernyms (Ordered by Estimated Frequency) of noun arsenic

2 senses of arsenic

Sense 1
arsenic, arsenic trioxide, arsenous anhydride, arsenous oxide, white arsenic, ratsbane -- (a white powdered poisonous trioxide of arsenic; used in manufacturing glass and as a pesticide (rat poison) and weed killer)
       => trioxide -- (an oxide containing three atoms of oxygen in the molecule)

Sense 2
arsenic, As, atomic number 33 -- (a very poisonous metallic element that has three allotropic forms; arsenic and arsenic compounds are used as herbicides and insecticides and various alloys; found in arsenopyrite and orpiment and realgar)
       => chemical element, element -- (any of the more than 100 known substances (of which 92 occur naturally) that cannot be separated into simpler substances and that singly or in combination constitute all matter)