| 释义 |
xy·lene
\ˈzīˌlēn\ noun
(-s)
Etymology: International Scientific Vocabulary xyl- + -ene
1. : any of three toxic flammable oily isomeric aromatic hydrocarbons C6H4(CH3)2 that are dimethyl homologues of benzene and are obtained from wood tar or commercially in mixtures of the three with ethylbenzene from light oils from coal tar or coke-oven gas or from petroleum distillates by processes for producing toluene:
a. : the ortho isomer used chiefly in making phthalic anhydride — called also ortho-xylene, o-xylene
b. : the para isomer used chiefly in making terephthalic acid — called also para-xylene, p-xylene
c. : the meta isomer occurring in the mixtures in larger amounts than the other components and used chiefly in making isophthalic acid and xylidines — called also meta-xylene, m-xylene
2. : a commercial mixture containing xylenes and ethylbenzene used chiefly as a solvent, as a blending agent especially in aviation gasoline, or in making xylidines |