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- n. The angle PFC formed by P = the periapsis of a celestial body's elliptical orbit, F = the focus of that orbit, and C = the current position of the celestial body.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. the angular distance of a point in an orbit past the point of periapsis measured in degrees
Sorry, no etymologies found.