What is "notodontian"

Notodontian \No`to*don"tian\, n. [Gr. nw^ton the back + 'odoy`s, 'odo`ntos a tooth.] (Zo["o]l.) Any one of several species of bombycid moths belonging to Notodonta, Nerice, and allied genera. The caterpillar of these moths has a hump, or spine, on its back.

n. (context zoology English) Any of several species of bombycid moths belonging to (taxlink Notodonta genus), (taxlink Nerice genus), and allied genus, whose caterpillars have a hump, or spine, on the back.