ethane, viewed as being composed of two methyl molecules
b.
(as modifier)
dimethyl sulphide
dimethyl in American English
(daɪˈmɛθəl)
adjective
containing two methyl radicals
dimethyl in American English
(daiˈmeθəl)
noun
Chemistry
ethane
Word origin
[1865–70; di-1 + methyl]This word is first recorded in the period 1865–70. Other words that entered Englishat around the same time include: dunk, figure skating, goulash, maverick, tick-tack-toedi- is a prefix occurring in loanwords from Greek, where it meant “two,” “twice,” “double”(diphthong). On this model, di- is freely used in the formation of compound words (dicotyledon; dipolar) and in chemical terms (diatomic; disulfide)