ansa

n. (ăn"sȧ) pl. Ansæ (ăn"sǣ).

[L., a handle.]
(Astron.) A name given to either of the projecting ends of Saturn's ring.

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(ăn'sə)
n., pl. -sae (-sē).

An anatomical structure shaped like a loop or an arc.

IN BRIEF: The part of a celestial body having the appearance of a handle; a loop.