stegodon

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steg·o·don

S0732900 (stĕg′ə-dŏn′)n. Any of various extinct proboscidean mammals of the genus Stegodon of the Pliocene to the Pleistocene Epochs, having long straight tusks.
[New Latin Stegodōn, genus name : Greek stegos, roof (from stegein, to cover; see (s)teg- in Indo-European roots) + -odon (so called because of the distinctive ridges on its molars).]

stegodon

(ˈstɛɡəˌdɒn) or

stegodont

n (Palaeontology) any proboscidean mammal of the genus Stegodon, of Pliocene to Pleistocene times, similar to the mastodons[C19: New Latin (literally: ridge-toothed), from Greek stegos roof, from stegein to cover + odōn tooth]