prehalluxn.
/priːˈhaləks/, U.S. /priˈhæləks/ Zoology.
A rudimentary digit found on the inner side of the tarsus of some mammals, reptiles, and amphibians, sometimes as a congenital abnormality. Cf. prepollex n.
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the world > animals > animal body > general parts > constituent materials > [noun] > rudimentary bone
prehallux1888
prepollex1889
1888 Proc. Zool. Soc. 150 That the pre-hallux takes on certain of the essential relationships of a digit is beyond dispute. That it really represents one is another question.
1951 C. K. Weichert Anat. Chordates x. 484 A small additional bone, the prehallux, or calcar, occurs on the tibial side of the tarsus in most salientians.
1976 Nature 19 Aug. 685/1 This joint consisted of three bones in primitive anthropoids, the first metatarsal, medial cuneiform and prehallux.
1991 Mouse Genome 89 569 Frank polydactyly was seen as a prehallux of claw plus distal part of phalanx in 3 limbs.
This entry has been updated (OED Third Edition, March 2007; most recently modified version published online March 2022).
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n.1888