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 sea urchin is as below...

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

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..

Coronal :: Coronal (a.) Of or pertaining to the shell of a sea urchin.

Sea Hedgehog :: Sea hedgehog () A sea urchin.

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

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

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..

Semita :: Semita (n.) A fasciole of a spatangoid sea urchin.

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

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..

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

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

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..

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.

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

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

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

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

Pluteus :: Pluteus (n.) The free-swimming larva of sea urchins and ophiurans, having several long stiff processes inclosing calcareous rods..

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

Random Fonts

Most Popular