English to English

noun (n)

• an acrobat who balances himself in difficult positions(noun.person)

  source: wordnet30
• either of the rudimentary hind wings of dipterous insects; used for maintaining equilibrium during flight(noun.animal)

  Synonym:
  halter, haltere
  

  source: wordnet30
• One who balances, or uses a balance.(noun)

  source: webster1913