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Webster 1913 Edition

Noun.

That which is orbiculate; especially, a solid the vertical section of which is oval, and the horizontal section circular.

orbiculate ‎(comparative more orbiculate, superlative most orbiculate)

spherical or circular; orbicular
Walter Morrison invented an orbiculate dish named the Frisbee in 1955.

spherical or circular

orbiculate ‎(plural orbiculates)

That which is orbiculate, especially a solid whose vertical section is oval and whose horizontal section is circular.

orbiculāte