/mez"i til, mes"-/ , Chem.
an oily, colorless liquid, C 6 H 10 O, having a honeylike odor: used chiefly as a solvent and in the manufacture of synthetic organic compounds. Also called isopropylideneacetone, methylisobutenyl ketone .
[ 1870-75; mesityl mesit ( a ) ( mesítes mediator, go-between, equiv. to mes- MES- + -ites -ITE 1 ) + -YL ]