gressorious

<ornithology, zoology> Adapted for walking; anisodactylous; as the feet of certain birds and insects. ... Origin: L. Gressus, p. P. Of gradi to step, go. ... Source: Websters Dictionary ... (01 Mar 1998) ...
Found on http://www.encyclo.co.uk/local/20973

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Gressorious

• (a.) Adapted for walking; anisodactylous; as the feet of certain birds and insects. See Illust. under Aves.
Found on http://thinkexist.com/dictionary/meaning/gressorious/

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