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
- 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)