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gressorial

[gre-sawr-ee-uh l, -sohr-]
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adjective Zoology.
  1. adapted for walking, as the feet of some birds.
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Origin of gressorial

1835–45; < Latin gress(us), past participle of gradī to walk + -orial, as in grallatorial
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

British Dictionary definitions for gressorial

gressorial

gressorious

adjective
  1. (of the feet of certain birds) specialized for walking
  2. (of birds, such as the ostrich) having such feet
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Word Origin

C19: from New Latin gressōrius, from gressus having walked, from gradī to step
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012