• (n.) The possession of more that the normal number of digits.
(pol″e-dak´tәl-iz-әm) polydactyly.
Pol`y·dac'tyl·ism noun [ Poly- + Greek ... finger: confer French polydactylisme .] (Anat.) The possession of more that the normal number of digits. 
Type: Term Pronunciation: pol′ē-dak′til-izm Synonyms: polydactyly
Polydactylism is the medical condition of a person having more than five fingers on each hand.
polydactyly, polydactyl, polydactylia, polydactylism 1. A developmental anomaly characterized by the presence of supernumerary digits (fingers or toes) on the hands and/or feet. 2. Having more than the normal number of fingers or toes.
The occurrence of more than the usual number of toes