adjective. Spreading or expanded.

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.

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

adjective. open; spread; exposed

"Those open indentations are called patulous or atrophic scars, and there are ice pick scars that look like tiny indented slivers on the skin."

expanded  open