biplane


From The Collaborative International Dictionary of English v.0.48:

Biplane \Bi"plane\, n. [Pref. bi- + plane.] (A["e]ronautics)
   An a["e]roplane with two main supporting surfaces one above
   the other.
   [Webster 1913 Suppl.]
.

From The Collaborative International Dictionary of English v.0.48:

Biplane \Bi"plane\, a. (A["e]ronautics)
   Having, or consisting of, two superposed planes,
   a["e]rocurves, or the like; of or pertaining to a biplane;
   as, a biplane rudder.
   [Webster 1913 Suppl.]
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