The second cusp or pointed projection on the upper molar teeth of certain animals, particularly mammals.
From deutero- (second) + -cone (from Greek 'konos' meaning 'cone'). This term is used in dental morphology to describe the second primary cusp developed on molars.
By studying the pattern of these tooth cusps, paleontologists can identify which prehistoric animals are related to each other—it's like reading the family tree written in teeth!
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