from The American Heritage® Dictionary of the English Language, 4th Edition

  • adj. Having the shape of a spheroid generated by rotating an ellipse about its longer axis.
  • adj. Having the polar axis longer than the equatorial diameter: a prolate spheroid.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • adj. Elongated at the poles.
  • v. To utter; to pronounce.

from the GNU version of the Collaborative International Dictionary of English

  • adj. Stretched out; extended; especially, elongated in the direction of a line joining the poles; ; -- opposed to oblate.
  • transitive v. To utter; to pronounce.

from The Century Dictionary and Cyclopedia

  • To utter, especially in a drawling manner; lengthen in pronunciation or sound.
  • Lengthened along one direction. A prolate spheroid is produced by the revolution of a semi-ellipse about its larger diameter. See oblate.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • adj. having the polar diameter greater than the equatorial diameter
  • adj. rounded like an egg


Latin prōlātus, past participle of prōferre, to stretch out : prō-, forth; see pro-1 + lātus, brought; see telə- in Indo-European roots.
(American Heritage® Dictionary of the English Language, Fourth Edition)
From Latin prolatum, past participle of proferre ("to extend, lengthen") (Wiktionary)


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