The Collaborative International Dictionary of English v.0.48:

Regel \Re"gel\ (r?"g?l), n. (Astron.)
   See Rigel.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Rigel \Ri"gel\, n. [Ar. rijl, properly, foot.] (Astron.)
   A fixed star of the first magnitude in the left foot of the
   constellation Orion. [Written also Regel.]
   [1913 Webster]