An arsenide (compound) is a compound with arsenic in oxidation state -3. An arsenide ion is an arsenic atom with three extra electrons and charge -3.
The term "arsenide" was found in the following pages:
Link database: OSHA: Chemical Sampling Information: Arsine
Directory of scientists: Alan G. Howard
Link database: Chemical Fact Sheet: Arsenic
Link database: Chemical Fact Sheet: Gallium