from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. Any of several univalent radicals, of formula (CH3)2C6H3- derived from the three isomers of xylene:- ortho-, meta- and para- (di-methyl benzene).
from the GNU version of the Collaborative International Dictionary of English
- n. Any one of three metameric radicals which are characteristic respectively of the three xylenes.
xyl- + -yl (Wiktionary)