add. ·noun an aeroplane with two main supporting surfaces one above the other.
2. biplane ·add. ·adj having, or consisting of, two superposed planes, aerocurves, or the like; of or pertaining to a biplane; as, a biplane rudder.
add. ·noun an aeroplane with two main supporting surfaces one above the other.
2. biplane ·add. ·adj having, or consisting of, two superposed planes, aerocurves, or the like; of or pertaining to a biplane; as, a biplane rudder.
Webster English vocab. Английский словарь Webster. 2012