accessory mineral
Noun. (mineralogy) any mineral that is present in small amounts in a rock, but is not considered to be characteristic of the rock.This is an unmodified, but possibly outdated, definition from Wiktionary and used here under the Creative Commons license. Wiktionary is a great resource. If you like it too, please donate to Wikimedia.
This entry was last updated on RefTopia from its source on 3/20/2012.