ˈtripˌtān noun
( -s )
Etymology: tri methyl + p (alteration of b in butane ) + bu tane
: a liquid hydrocarbon (CH 3 ) 3 CCH(CH 3 ) 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