Cassini division Hear it!

Cassini division definition

Cas·sini division (ka sē′nē)

the gap or dark region between the two main outer rings of Saturn: it has a width of about 4,700 km (2,920 mi)
also Cassini's division

Webster's New World College Dictionary Copyright © 2009 by Wiley Publishing, Inc., Cleveland, Ohio.
Used by arrangement with John Wiley & Sons, Inc.

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