【医】 zona germinativum unguis
armour; first; nail; shell
【医】 carapace; concha; conchae; helo-; nail; onycho-; onyx
happen; generate; occur; take place; engender; exist; go forward; go on
originate
【医】 genesis; occurrence
layer; region; stage; story; stratum; tier
【计】 layer
【医】 coat; lamella; lamellae; lamina; laminae; layer; strata; stratum
