plural -s
: a liquid hydrocarbon (CH3)3CCH(CH3)2 that is one of the highest antiknock motor fuels known and hence is a valuable blending agent especially for aviation gasolines to increase their power; 2,2,3-trimethyl-butane

Word History


trimethyl + p (alteration of b in butane) + butane

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Dictionary Entries Near triptane

Cite this Entry

“Triptane.” Dictionary, Merriam-Webster, Accessed 22 May. 2024.

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