Full Definition of FACET. 1. : a small plane surface (as on a cut gem) â see brilliant illustration. 2. : any of the definable aspects that make up a subject (as of contemplation) or an object (as of consideration). 3. : the external corneal surface of an ommatidium.
Definition of cyanide. 1  1 : a compound of cyanogen with a more electropositive element or group: such asa : potassium cyanideb : sodium cyanide. 2  2 : cyanogen 1.
They are commonly found as groundwater contaminants near gas stations, MGP sites, and other industrial facilities. Cyanides are a class of chemical compounds which contain a carbon-nitrogen triple bond. Free cyanide, in which the cyanide ion is found by itself (not complexed with other ions) is highly toxic.