[1] : The Collaborative International Dictionary of English v.0.48

urchin \ur"chin\ ^u"chi^n, n. oe. urchon, irchon, a
   hedgehog, of. ire,con, eri,con, heri,con, herichon, f.
   h'erisson, a derivative fr. l. ericius, from er a hedgehog,
   for her; akin to gr. chh`r. cf. herisson.
   1913 webster
   1. zool. a hedgehog.
      1913 webster

   2. zool. a sea urchin. see sea urchin.
      1913 webster

   3. a mischievous elf supposed sometimes to take the form a
      hedgehog. "we 'll dress them like urchins, ouphes, and
      fairies." --shak.
      1913 webster

   4. a pert or roguish child; -- now commonly used only of a
      boy.
      1913 webster

            and the urchins that stand with their thievish eyes
            forever on watch ran off each with a prize. --w.
                                                  howitt.
      1913 webster

            you did indeed dissemble, you urchin you; but
            where's the girl that won't dissemble for an
            husband?                              --goldsmith.
      1913 webster

   5. 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. --knight.
      1913 webster

   urchin fish zool., a diodon.
      1913 webster
see also:
herisson sea urchin urchin fish 

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