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“heterodactyl”
heterodactyl (adjective) (not comparable)
Relating to the feet of birds where the toes, or one of them, are irregular or abnormal, as certain families of birds: Heterodactyl conditions can be detected in particular birds that have the first and second toes facing backwards, and the third and fourth toes facing forwards.
This entry is located in the following units:
dactylo-, dactyl-, dactylio-, -dactyl, -dactyla, -dactylia, -dactylic, -dactylism, -dactyloid, -dactylous, -dactyly
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heter-, hetero-
(page 3)