Definition of puss caterpillar in English:
puss caterpillar
noun
informal1The larva of the puss moth, Cerura vinula.
2US The larva of the moth Megalopyge opercularis (family Megalopygidae), of the south-eastern United States, which is covered with long silky hairs that conceal stinging hairs; (also, more fully "puss caterpillar moth") the moth itself.
Origin
Mid 19th century.
Are You Learning English? Here Are Our Top English Tips