ARCIFORM

arced, arched, arching, arciform, arcuate, bowed

(adjective) forming or resembling an arch; “an arched ceiling”

Source: WordNet® 3.1

Etymology

Adjective

arciform (comparative more arciform, superlative most arciform)

Having the form of a bow (weapon)

Source: Wiktionary

Ar"ci*form, a. Etym: [L. arcus bow + -form.]

Definition: Having the form of an arch; curved.

Source: Webster’s Unabridged Dictionary 1913 Edition