streptococcus (n.)

word-forming element used in science to mean "twisted," from Latinized combining form of Greek streptos "twisted, easy to bend, pliant," verbal adjective of strephein "to turn, twist," from PIE root *streb(h)- "to wind, turn."

word-forming element meaning "berry, seed," or something shaped like them, from Latinized form of Greek kokkos "a grain, a seed," especially "kermes-berry, gall of the kermes oak" (actually an insect), which yields scarlet dye, a word of unknown origin, perhaps from a non-Greek source.