/ Dictionary / Index M mendelevium: Meaning and Definition of Find definitions for: men•de•le•vi•um Pronunciation: (men"dl-ē'vē-um), [key] — n. Chem., Physics. a transuranic element. Symbol: Md, Mv; at. no.: 101. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: mendelevium (Thesaurus) Mendeleev's law Mendelian Related Content Daily Word Quiz: clairvoyant Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language