【医】 primary cortex
at the beginning of; early; elementary; first; original
【医】 arch-; arche-; prot-; proto-
peltry; rawhide
【化】 fell; raw hide
layer; region; stage; story; stratum; tier
【计】 layer
【医】 coat; lamella; lamellae; lamina; laminae; layer; strata; stratum