Thanks for using this online dictionary, we have been helping millions of people improve their use of the english language with its free online services. English definition of urchin is as below...

Siphon :: Siphon (n.) A tubular organ connected both with the esophagus and the intestine of certain sea urchins and annelids.

Jewstone :: Jewstone (n.) A large clavate spine of a fossil sea urchin.

Auricula :: Auricula (n.) One of the five arched processes of the shell around the jaws of a sea urchin.

Fasciole :: Fasciole (n.) A band of minute tubercles, bearing modified spines, on the shells of spatangoid sea urchins. See Spatangoidea..

Urchin :: Urchin (a.) Rough; pricking; piercing.

Regularia :: Regularia (n. pl.) A division of Echini which includes the circular, or regular, sea urchins..

Unkempt :: Unkempt (a.) Not combed; disheveled; as, an urchin with unkempt hair..

Petalosticha :: Petalosticha (n. pl.) An order of Echini, including the irregular sea urchins, as the spatangoids. See Spatangoid..

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

Elfin :: Elfin (n.) A little elf or urchin.

Aristotle's Lantern :: Aristotle's lantern () The five united jaws and accessory ossicles of certain sea urchins.

Urchon :: Urchon (n.) The urchin, or hedgehog..

Tow-head :: Tow-head (n.) An urchin who has soft, whitish hair..

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

Micraster :: Micraster (n.) A genus of sea urchins, similar to Spatangus, abounding in the chalk formation; -- from the starlike disposal of the ambulacral furrows..

Echinus :: Echinus (n.) A genus of echinoderms, including the common edible sea urchin of Europe..

Sea Urchin :: Sea urchin () Any one of numerous species of echinoderms of the order Echinoidea.

Clypeastroid :: Clypeastroid (a.) Like or related to the genus Clupeaster; -- applied to a group of flattened sea urchins, with a rosette of pores on the upper side..

Turban-shell :: Turban-shell (n.) A sea urchin when deprived of its spines; -- popularly so called from a fancied resemblance to a turban.

Sphaeridium :: Sphaeridium (n.) A peculiar sense organ found upon the exterior of most kinds of sea urchins, and consisting of an oval or sherical head surmounting a short pedicel. It is generally supposed to be an olfactory organ..

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