【医】 fissurae prima; primary fissure
former; original
【化】 ortho-
【医】 arch-; arche-; ortho-; pro-; prot-; proto-
crack; rend; split
【医】 cleavage; cleft; crena; crenae; diastem; diastema; fissura; fissure
gap; rictus; rima; rimae; schistasis; schisto-; schizo-