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

  • adj. Botany Spreading or expanded: patulous branches.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • adj. open; spread; exposed

from the GNU version of the Collaborative International Dictionary of English

  • adj. Open; expanded; slightly spreading; having the parts loose or dispersed

from The Century Dictionary and Cyclopedia

  • Spreading.
  • Specifically— In botany, spreading slightly; expanded: as, a patulous calyx; bearing the flowers loose or dispersed: as, a patulous peduncle
  • In entomology, noting wings which when at rest are longitudinal, or nearly so, but near the body, and partly overlapping each other, as in certain moths.
  • Gaping; patent; having a, spreading aperture.


From Latin patulus, from patēre, to be open; see petə- in Indo-European roots.
(American Heritage® Dictionary of the English Language, Fourth Edition)



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  • Wide-spreading or wide open.

    May 16, 2008