/ Dictionary / Index E eubacteria: Meaning and Definition of Find definitions for: eu•bac•te•ri•a Pronunciation: (y"bak-tēr'ē-u), [key] — sing. -te•ri•um spherical or rod-shaped bacteria of the order Eubacteriales, characterized by simple, undifferentiated cells with rigid walls; true bacteria. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: eubacteria (Thesaurus) eu- Euboea Related Content Daily Word Quiz: paradox Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language