• Webster's Revised Unabridged Dictionary
    • n Didactyl (Zoöl) An animal having only two digits.
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Century Dictionary and Cyclopedia
    • didactyl Having only two digits, as fingers or toes; two-fingered or two-toed: in the arthropods, applied to limbs which terminate in a forceps or chela. Also bidactyl.
    • n didactyl An animal having two toes only on each foot, as the Bradypus didactylus or two-toed sloth.
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Chambers's Twentieth Century Dictionary
    • adj Didactyl dī-dak′til having only two digits—also Didac′tylous
    • n Didactyl an animal with two toes only on each foot
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Webster's Revised Unabridged Dictionary
Gr. di- = di`s- twice + finger, toe: cf. F. didactyle,