armature
armor
armor plate
bark
body armor
border
buckler
bulletproof vest
chain armor
chain mail
chitin
circumference
coat of mail
cork
covering
crust
elytron
envelope
epicarp
epidermis
episperm
exterior
external
facade
face
facet
fringe
front
habergeon
harness
hauberk
integument
lineaments
lorica
lorication
mail
needles
outer face
outer layer
outer side
outer skin
outline
outside
panoply
peel
peeling
pericarp
periphery
phellum
cortices
animal tissue
acuity
artery
brainstem
cerebellum
cerebrum
convolution
dysfunction
ganglia
gland
gyrus
hemisphere
hippocampus
hypothalamus
lesion
lobe
medulla
midbrain
nerve
nucleus
pituitary
retina
septum
stimulation
tissue
vortex