/ Dictionary / Index D dimethylnitrosamine: Meaning and Definition of Find definitions for: di•meth•yl•ni•tros•a•mine Pronunciation: (dī-meth"ul-nī-trō'su-mēn", -nī"trōs-am'in), [key] — n. Chem. a yellow, water-soluble carcinogenic liquid, CHNO, found in tobacco smoke and certain foods: known to be a potent carcinogen. Abbr.: DMN, DMNA Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. dimethylmethane dimethyl sulfate Related Content Daily Word Quiz: labyrinth Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language