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

Echinus :: Echinus (n.) A name sometimes given to the egg and anchor or egg and dart molding, because that ornament is often identified with Roman Doric capital. The name probably alludes to the shape of the shell of the sea urchin..

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

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

Rosette :: Rosette (n.) Any structure having a flowerlike form; especially, the group of five broad ambulacra on the upper side of the spatangoid and clypeastroid sea urchins. See Illust. of Spicule, and Sand dollar, under Sand..

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..

Lithophagous :: Lithophagous (a.) Eating or destroying stone; -- applied to various animals which make burrows in stone, as many bivalve mollusks, certain sponges, annelids, and sea urchins. See Lithodomus..

Paleechinoidea :: Paleechinoidea (n. pl.) An extinct order of sea urchins found in the Paleozoic rocks. They had more than twenty vertical rows of plates. Called also Palaeechini.

Lurching :: Lurching (p. pr. & vb. n.) of Lurc.

Sea Egg :: Sea egg () A sea urchin.

Churching :: Churching (p. pr. & vb. n.) of Churc.

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

Piper :: Piper (n.) A sea urchin (Goniocidaris hystrix) having very long spines, native of both the American and European coasts..

Spatangus :: Spatangus (n.) A genus of heart-shaped sea urchins belonging to the Spatangoidea.

Scrobicula :: Scrobicula (n.) One of the smooth areas surrounding the tubercles of a 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..

Urchin :: Urchin (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..

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

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

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

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