1) Chemical compound 2) Compound 3) Compound of a toxic substance 
Arsenides are toxic because of the inherent toxicity of arsenic and all of its compounds. Metal arsenides react with acids to form highly toxic arsine gas. See category for a list. ...
• (n.) A compound of arsenic with a metal, or positive element or radical; -- formerly called arseniuret.
any member of a rare mineral group consisting of compounds of one or more metals with arsenic (As). The coordination of the metal is almost always ... [1 related articles]
Ar'sen·ide noun (Chemistry) A compound of arsenic with a metal, or positive element or radical; -- formerly called arseniuret . 
Type: Term Pronunciation: ar′sĕ-nīd Definitions: 1. A compound of arsenic with a metal or other positively charged atoms or groups in which the arsenic is not bound to any atoms of oxygen. Synonyms: arseniuret
[n] - a compound of arsenic with a more positive element
noun a compound of arsenic with a more positive element