Bible Dictionaries
Biplane

Webster's Dictionary

(1):

(n.) An aeroplane with two main supporting surfaces one above the other.

(2):

(a.) Having, or consisting of, two superposed planes, aerocurves, or the like; of or pertaining to a biplane; as, a biplane rudder.

Bibliography Information
Webster, Noah. Entry for 'Biplane'. Noah Webster's American Dictionary. https://www.studylight.org/​dictionaries/​eng/​web/​b/biplane.html. 1828.