What is "rasorial"

Rasorial \Ra*so"ri*al\ (r[.a]*z[=o]"r[i^]*al; 277), a. (Zo["o]l.) Of or pertaining to the Rasores, or gallinaceous birds, as the peacock, domestic fowl, partridge, quail, and the like.

a. 1 scratch the ground for food, as domestic fowl or other gallinaceous birds. 2 (context ornithology historical English) Pertaining to the now obsolete order Rasores.