Sarcina

noun

1. A genus of schizomycetous fungi or bacteria, closely allied to the genus Bacterium.
2. [lowercase] Pl. sarcinæ (-nē). A fungus of the genus Sarcina.
3. A genus of bacteria found in various organic fluids, especially in those those of the stomach, associated with certain diseases. The individual organisms undergo division along two perpendicular partitions, so that multiplication takes place in two directions, giving groups of four cubical cells. Also used adjectively.

   "a sarcina micrococcus; a sarcina group"

4. the tetrad form seen in the division of a dumb-bell group of micrococci into four; -- applied particularly to bacteria. See micrococcus.