'Balancer' definitions:

Definition of 'balancer'

From: WordNet
noun
An acrobat who balances himself in difficult positions
noun
Either of the rudimentary hind wings of dipterous insects; used for maintaining equilibrium during flight [syn: halter, haltere, balancer]

Definition of 'Balancer'

From: GCIDE
  • Balancer \Bal"an*cer\, n.
  • 1. One who balances, or uses a balance. [1913 Webster]
  • 2. (Zool.) In Diptera, the rudimentary posterior wing. [1913 Webster]