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Webster 1913 Edition

Adj.

[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.

Adj.

[L. patulus, from pateo, to be open.]

Spreading, as a patulous calyx; bearing the flowers loose or dispersed, as a patulous peduncle.

patulous ‎(comparative more patulous, superlative most patulous)

open; spread; exposed
- 1846, The Medical Times (volume 13, page 374)
  The foramen ovale was patulous — the opening about four lines in diameter.