Arsenic - Definition
arsenic
n 1: a white powdered poisonous trioxide of arsenic; used in
manufacturing glass and as a pesticide (rat poison) and
weed killer [syn: arsenic, arsenic trioxide, arsenous
anhydride, arsenous oxide, white arsenic, ratsbane]
2: 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 [syn: arsenic, As, atomic
number 33]