HAGDON n.
One of several species of sea birds of the genus Puffinus; esp., P. major, the greater shearwarter, and P. Stricklandi, the black hagdon or sooty shearwater; -- called also hagdown, haglin, and hag. See Shearwater.
HEDGEHOG n.
A form of dredging machine. Knight. Hedgehog caterpillar (Zoöl.), the hairy larvæ of several species of bombycid moths, as of the Isabella moth. It curls up like a hedgehog when disturbed. See Woolly bear, and Isabella moth. -- Hedgehog fish (Zoöl.), any spinose plectognath fish, esp. of the genus Diodon; the porcupin…