polydactylyn.
/ˌpɒlɪˈdaktᵻli/, /ˌpɒlɪˈdaktl̩i/, U.S. /ˌpɑliˈdæktəli/ Zoology and Medicine.
The condition of having more than the usual number of digits (esp. more than five) on a foot or hand, either as a congenital abnormality or (in certain prehistoric animals) as a normal condition.
ΘΚΠ
the world > life > the body > external parts of body > limb > digit > [noun] > having specific number of
sexdigitism1775
polydactylism1865
pentadactylism1879
polydactyly1886
tetradactylity1891
pentadactyly1892
the world > health and disease > ill health > deformity > deformities of specific parts > [noun] > supernumerary limbs > fingers and toes
polydactylism1865
polydactyly1886
1886 Proc. Zool. Soc. 552 The majority of cases of polydactyly occurring in Horses.
1918 Science 15 Mar. 259/1 A few abnormalities, polydactyly, for example, are germinal and can not be produced experimentally.
1946 R. R. Gates Human Genetics I. xi. 422 Just as families can differ greatly in the degree of expression of polydactyly, so they can differ in the degree of dominance of the character.
1994 Nature 7 Apr. 509/1 The most striking feature shared by these late Famennian forms is polydactyly: Acanthostega had eight digits on fore..and hind limbs, Ichthyostega had seven on the hind limb.., while Tulerpeton appears to have had six digits on both.
This entry has been updated (OED Third Edition, September 2006; most recently modified version published online March 2022).
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n.1886