Why Is It Called a Monoplane?

Monoplane, type of aircraft with a single pair of wings. The monoplane design has been nearly universally adopted over multiplane configurations because airflow interference between adjacent wings reduces efficiency.

What is the difference between a monoplane and a biplane?

A monoplane is a fixed-wing aircraft configuration with a single main wing plane, in contrast to a biplane or other multiplane, which have multiple planes. ... A biplane is a fixed-wing aircraft with two main wings stacked one above the other.

Why do they call it airplane?

Etymology and usage

First attested in English in the late 19th century (prior to the first sustained powered flight), the word airplane, like aeroplane, derives from the French aéroplane, which comes from the Greek ἀήρ (aēr), "air" and either Latin planus, "level", or Greek πλάνος (planos), "wandering".