Webster’s Revised Unabridged Dictionary · 1913
Patulous
Pat′u·lous (păt′ū·lŭs), a. [L. patulus, fr. patere to be open, extend.] Open; expanded; slightly spreading; having the parts loose or dispersed; as, a patulous calyx; a patulous cluster of flowers.
The eyes are large and patulous. Sir J. Hill.