from The American Heritage® Dictionary of the English Language, 4th Edition
- adj. Having three toes, claws, or similar parts on each limb.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- adj. Having three digits on a limb.
- adj. Composed of three movable parts attached to a common base.
from the GNU version of the Collaborative International Dictionary of English
- adj. Having three fingers or toes, or composed of three movable parts attached to a common base.
from The Century Dictionary and Cyclopedia
- Having three digits, whether fingers or toes; tridigitate.
- Having three digital parts or processes. Also tridactylous.
Or even tridactyl, like your emu claws, but … I counted.
Your emu, by contrast, has three toes in a tridactyl arrangement.
Interestingly, they used tree kangaroos as a model, and the feet of the dinosauroid are not tridactyl and clawed as usually shown in drawings, but four-toed, with nails rather than claws, and with the two medial toes smaller than the lateral ones.
This contrasts with the dipodine jerboas Paradipus, Dipus, Stylodipus, Eremodipus and Jaculus, all of which lack lateral digits and are tridactyl.
The largest, tridactyl footprint can be ascribed to a right foot of a rhinoceros.
Desiccation is obvious in one specimen with a rather small tridactyl imprint since it presents some thin cracks or fissures.
Both tridactyl imprints may have been produced by the coprolite-makers.
A smaller coprolite Va2 unit shows a tridactyl, left foot impression of a perissodactyl.
The tridactyl species are as expert climbers as any members of the family, and are extremely hardy birds, too, some of them dwelling the year round in cold northern climates, where the food question must often be a serious one.
Curious to tell, several species of woodpeckers are tridactyl -- that is, three-toed -- and still more curious is the fact that in their case the true hind toe is lacking, while the outer front toe is bent backward, or "reversed," as it is called, and is thus made to do service for a hind toe.