balan-
combining form 
or balano-
Etymology: New Latin, from Greek balan-, balano- acorn, from balanos acorn, glans penis — more at gland 
1. : glans penis 
< balanitis >
< balanoblennorrhea >
2. : acorn 
< Balanops >
or balano-
1.
< balanitis >
< balanoblennorrhea >
2.
< Balanops >