/ Dictionary / Index S staphylococcus: Meaning and Definition of Find definitions for: staph•y•lo•coc•cus Pronunciation: (staf"u-lu-kok'us), [key] — pl. -coc•ci any of several spherical bacteria of the genus Staphylococcus, occurring in pairs, tetrads, and irregular clusters, certain species of which, as S. aureus, can be pathogenic for humans. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: staphylococcus (Thesaurus) staphylo- staple Related Content Daily Word Quiz: endear Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language