D defs.my
Entry 2 senses Webster, 1913

Balancer

/băl'-ən-sẽr/ · Bal·an·cer · IPA /ˈbæ.lən.sɚ/
01 n. One who balances, or uses a balance.
  1. 1.
    One who balances, or uses a balance.
  2. 2.
    In Diptera, the rudimentary posterior wing.(Zool.)