Definition of "gressorial" []

• Adapted for walking or having limbs adapted for walking. Used of flightless birds. (adjective)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

• "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."