/ Dictionary / Index M macrofossil: Meaning and Definition of Find definitions for: mac•ro•fos•sil Pronunciation: (mak"ru-fos'il), [key] — n. a fossil large enough to be studied and identified without the use of a microscope. Cf. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. macroform macrogamete Related Content Daily Word Quiz: feline Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language