WordReference Random House Unabridged Dictionary of American English © 2025
tet•ra•coc•cus
(te′trə kok′əs),USA pronunciation n., pl. -coc•ci (-kok′sī, -sē),USA pronunciation [Bacteriol.]
- Microbiologya spherical bacterium occurring in square groups of four.
- tetra- + -coccus 1895–1900