【医】 fissure bur
crack; rend; split
【医】 cleavage; cleft; crena; crenae; diastem; diastema; fissura; fissure
gap; rictus; rima; rimae; schistasis; schisto-; schizo-
bore; dig into; drill; get into; jewel
【医】 bur; burr; buur drill; dental drill; drill; drilling
【经】 bit