balance beam(n = noun.artifact) beam - a gymnastic apparatus used by women gymnasts;
is a kind of exerciser, gymnastic apparatus

acid-base balance, analytical balance, balance, balance of international payments, balance of payments, balance of power, balance of trade, balance sheet, balance wheel, beam, beam balance, beam of light, beam scale, beam tree, box beam, chemical balance, compensating balance, dynamic balance, electrolyte balance, electron beam, electronic balance, high beam, inoic beam, invisible balance, ion beam, laser beam, libra the balance, light beam, low beam, mental balance, nitrogen balance, off balance, offsetting balance, on the beam, particle beam, radio beam, sense of balance, spring balance, strike a balance, tie beam, torsion balance, trade balance, trial balance, visible balance