definingcharacteristic

As an adjective heterodont is

(zoology) having teeth of different types (like most mammals).

As a noun heterodont is

(zoology) a heterodont animal.

Definingcharacteristic is likely misspelled.

Definingcharacteristic has no English definition.

As an adjective canine

is of, or pertaining to, a dog or dogs.

As a noun canine

is any member of Caninae, the only living subfamily of Canidae.