| trilinear | <mathematics> Of, pertaining to, or included by, three lines; as, trilinear coordinates. Source: Websters Dictionary (01 Mar 1998) |
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| eulerian coordinates | <radiobiology> Coordinates which are fixed in an inertial reference frame, contrast with Lagrangian Coordinates. See: Eulerian Frame, Lagrangian Frame. (09 Oct 1997) |