prolate

adjective
pro·​late | \ˈprō-ˌlāt \

Definition of prolate 

: extended especially : elongated in the direction of a line joining the poles a prolate spheroid

First Known Use of prolate

1715, in the meaning defined above

History and Etymology for prolate

Latin prolatus (past participle of proferre to bring forward, extend) from pro- forward + latus, past participle of ferre to carry — more at bear, tolerate

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The first known use of prolate was in 1715

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