(1):

(n.) A mischievous elf supposed sometimes to take the form a hedgehog.

(2):

(n.) A sea urchin. See Sea urchin.

(3):

(n.) A pert or roguish child; - now commonly used only of a boy.

(4):

(n.) 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.

(5):

(n.) A hedgehog.

(6):

(a.) Rough; pricking; piercing.