耳嚢 is read as じのう (jinou) and means otocyst.
じのう
jinou
じもく
eyes and ears
みみ
ear
みみもと
close to the ear
みみざわり
hard (on the ears)
じびか
otolaryngology
みみより
welcome (news)
みみうち
whispering into a person's ear
みみかざり
earring
みみなれる
to become familiar (to one's ears)
じびいんこうか
otorhinolaryngology
みみひみず
Chinese shrew mole (Uropsilus soricipes)
みみのふじゆう
deafness