cy·mene 
(sīmēn′)
(sīmēn′)n.
1. Any of three colorless liquid isomeric aromatic hydrocarbons, C10H14, used in the manufacture of synthetic resins and other organic synthesis.
2. The para-isomer of cymene, which occurs naturally in essential oils, especially of cumin and thyme.
[French cymène, from Greek kumīnon, cumin; see CUMIN.]