Definitionen
1.NounA hedgehog.
2.NounA mischievous elf supposed sometimes to take the form of a hedgehog.
3.NounA mischievous child.
4.NounA street urchin, a child who lives, or spends most of their time, in the streets.
5.NounA sea urchin.
6.NounOne of a pair in a series of small card cylinders arranged around a carding drum; so called from its fancied resemblance to the hedgehog.
7.NounA neutron-generating device that triggered the nuclear detonation of the earliest plutonium atomic bombs.