outrigger
out.rig.ger \'au.t-.rig-*r\ n 1a: a projecting spar with a shaped log at
the end attached to a canoe to p revent upsetting 1b: a spar or projecting
beam run out from a ship's side to help secure the masts or from a mast to
extend a rope or sail 1c: a projecting support for an oarlock; also : a
boat so equipped 2: a projecting member run out from a main structure to
provide additional stability or to support an extension; esp : a
projecting frame to support the elevator or tail planes of an airplane or
the rotor of a helicopter