urchin

A mischievous child.

And like these fresh green things were the dozens of babies, tots, toddlers, noisy urchins, laughing girls, a whole multitude of children of one family. For Collier Brandt, the father of all this numerous progeny, was a Mormon with four wives.

A street urchin, a child who lives, or spends most of their time, in the streets.

And the urchins that stand with their thievish eyes / Forever on watch ran off each with a prize.

A sea urchin.

One of a pair in a series of small card cylinders arranged around a carding drum; so called from its fancied resemblance to the hedgehog.

Here we have a carding-engine, with the drum surmounted with urchin or squirrel cards[…]

A neutron-generating device that triggered the nuclear detonation of the earliest plutonium atomic bombs.