| Adapoids | fossil primates; members of the infraorder Adapiformes, suborder Strepsirrhini
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| Archonta | superorder of mammals made up of the extinct Pleseadapiformes and the living orders Primates, Scandentia (the tree shrews), Chiroptera (the bats), and Dermoptera (flying lemurs)
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| canine dimorphism | difference between the sexes of a species in the size of the canine teeth
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| chronometric dating | techniques methods of dating that provide a specific age of a fossil based either on analysis of a piece of the fossil itself or analysis of the rocks surrounding the fossil
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| encephalization quotient (EQ) | ratio of brain to body size; an EQ of 1 indicates a brain size expected for that mammalian body size
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| heterodontism | having different types of teeth
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