thelo-, thel-, thele- (Greek: teat, teats, nipple, nipples).theleplasty: 
Plastic surgery of the nipples.
 
thelerethism: 
Erection of the nipples.
 
thelitis: 
Inflammation of the nipples.
 
thelium: 
Nipple, a nipple-like structure; papilla.
 
theloncus: 
A tumor of a nipple.
 
thelorrhgia: 
Bleeding from the nipple.
 
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