polydactylous vs polydactyl

polydactylous and polydactyl both are adjectives.

Word	Noun	Adjective	Verb	Adverb
polydactylous	No	Yes	No	No
polydactyl	No	Yes	No	No

As adjectives, polydactylous and polydactyl are synonyms defined as:

polydactylous and polydactyl: of or relating to a person (or other vertebrate) having more than the normal number of digits

polydactylous (adjective)	polydactyl (adjective)
of or relating to a person (or other vertebrate) having more than the normal number of digits	of or relating to a person (or other vertebrate) having more than the normal number of digits