Tightrope walker

• Fly appendage
• CPA, in a way
• Either of the club-like rudimentary hind wings of dipterous insects
• Gymnast, often
• Waiter, frequently

WordNet Word definitions in WordNet
n. an acrobat who balances himself in difficult positions either of the club-like rudimentary hind wings of dipterous insects; used for maintaining equilibrium during flight [syn: halter , haltere ]

Wiktionary Word definitions in Wiktionary
n. 1 one who, or that which, balances 2 any of the rear wings of certain insects used for stability in flight

The Collaborative International Dictionary Word definitions in The Collaborative International Dictionary
Balancer \Bal"an*cer\, n. One who balances, or uses a balance. (Zo["o]l.) In Diptera, the rudimentary posterior wing.

Wikipedia Word definitions in Wikipedia
Balancer are a hybrid breed of beef cattle , a combination of Gelbvieh and Angus . These cattle are bred for their hybrid vigour , resulting in a higher growth rate and better quality meat.