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The Collaborative International Dictionary
Pentadactyloid

Pentadactyloid \Pen`ta*dac"tyl*oid\,

  1. [Pentadactyl + -oid.] (Anat.) Having the form of, or a structure modified from, a pentadactyl lim

Wiktionary
pentadactyloid
  1. (context anatomy English) Having the form of, or a structure modified from, a pentadactyl lim