(adj.) Refers to any part of a vessel that is bent towards the inside of the vessel.
opposite in meaning to the natural, usual or traditional (such as inverted raises, where a single raise is stronger than s double raise); sometimes phrased as "upside-down".
A point or flap which has been turned inside out
The proper term to use when describing that regime of flight where pulling on the elevator stick causes the plane's nose to move toward the ground. Airplane speak for "upside down.
Upside down; of wings when the tips are downwards