Heterocera :: Heterocera (n. pl.) A division of Lepidoptera, including the moths, and hawk moths, which have the antennae variable in form..
Heterocercal :: Heterocercal (a.) Having the vertebral column evidently continued into the upper lobe of the tail, which is usually longer than the lower one, as in sharks..
Heterocercy :: Heterocercy (n.) Unequal development of the tail lobes of fishes; the possession of a heterocercal tail.