【医】 schizonychia
armour; first; nail; shell
【医】 carapace; concha; conchae; helo-; nail; onycho-; onyx
crack; rend; split
【医】 cleavage; cleft; crena; crenae; diastem; diastema; fissura; fissure
gap; rictus; rima; rimae; schistasis; schisto-; schizo-