n. One who balances or weighs; a weigher of things in or as in a balance.n. An acrobat; one who balances himself.n. One who or that which keeps a thing or things in equilibrium; that which maintains or helps to maintain something in a state of balance or equipoise.n. Specifically, in entomology, a halter (which see); a poiser; the small organ supposed to be useful in balancing the body; one of a pair of slender processes with clubbed ends placed near the insertion of the wings, especially of dipterous insects.n. In herpetology, an elongate cylindrical rod protruding from each side of the head of larval salamanders, in front of the gills: permanently retained in certain forms, as the cæcilias and some salamanders.