The second cusp or pointed projection on the lower molar teeth of mammals, corresponding to the deuterocone on upper molars.
From deutero- (second) + -conid, a variant suffix used specifically for lower molar cusps (the '-id' ending distinguishes lower teeth from upper teeth in dental terminology).
Mammal teeth are like fingerprints—each species has a unique pattern of cusps, and scientists use these precise tooth maps to identify fossil species and solve mysteries about ancient ecosystems.
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