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1. mineralogy-the branch of geology that studies minerals: their structure and properties and the ways of distinguishing them. geology-a science that deals with the history of the earth as recorded in rocks.geode - (mineralogy) a hollow rock or nodule with the cavity usually lined with crystals.ineralogy-the branch of geology that studies minerals: their structure and properties and the ways of distinguishing them. geology-a science that deals with the history of the earth as recorded in rocks. geode - (mineralogy) a hollow rock or nodule with the cavity usually lined with crystals.
ethology. n. 1. (Zoology) the study of the behaviour of animals in their normal environment. [C17 (in the obsolete sense: mimicry): via Latin from Greek Äthologia, from Äthos character; current sense, C19].