Definitions
from The Century Dictionary.
- In zoology, adapted for walking; formed for or having the habit of walking; ambulatory; specifically, in entomology, of or pertaining to the Gressoria: as, gressorial feet; gressorial birds; gressorial insects.
 
from the GNU version of the Collaborative International Dictionary of English.
- adjective (Zool.)  Adapted for walking; anisodactylous; as the feet of certain birds and insects. See Illust. under 
aves . 
from Wiktionary, Creative Commons Attribution/Share-Alike License.
- adjective zoology  Adapted for 
walking . 
Etymologies
from Wiktionary, Creative Commons Attribution/Share-Alike License
Latin gressus, past participle of gradior ("I walk") + -or + -ial
			
		
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Examples
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Despite his attempts at self-taught flight, he remains gressorial and speaks to himself and other animals in Jesse Eisenberg's stop-and-go whine.
 
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