Definition of urchin

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Urchin (n.) A hedgehog.

Lern More About Urchin

Regular :: Regular (a.) Having all the parts of the same kind alike in size and shape; as, a regular flower; a regular sea urchin..
Urchin :: Urchin (n.) A pert or roguish child; -- now commonly used only of a boy.
Galerite :: Galerite (n.) A cretaceous fossil sea urchin of the genus Galerites.
Petalosticha :: Petalosticha (n. pl.) An order of Echini, including the irregular sea urchins, as the spatangoids. See Spatangoid..
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 mischievous elf supposed sometimes to take the form a hedgehog.
Scrobicula :: Scrobicula (n.) One of the smooth areas surrounding the tubercles of a sea urchin.
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.
Coronal :: Coronal (a.) Of or pertaining to the shell of a sea urchin.
Fasciole :: Fasciole (n.) A band of minute tubercles, bearing modified spines, on the shells of spatangoid sea urchins. See Spatangoidea..
Siphon :: Siphon (n.) A tubular organ connected both with the esophagus and the intestine of certain sea urchins and annelids.
Echinoidea :: Echinoidea (n. pl.) The class Echinodermata which includes the sea urchins. They have a calcareous, usually more or less spheroidal or disk-shaped, composed of many united plates, and covered with movable spines. See Spatangoid, Clypeastroid..
Spatangoidea :: Spatangoidea (n. pl.) An order of irregular sea urchins, usually having a more or less heart-shaped shell with four or five petal-like ambulacra above. The mouth is edentulous and situated anteriorly, on the under side..
Semita :: Semita (n.) A fasciole of a spatangoid sea urchin.
Churching :: Churching (p. pr. & vb. n.) of Churc.
Elfin :: Elfin (n.) A little elf or urchin.
Tow-head :: Tow-head (n.) An urchin who has soft, whitish hair..
Pluteus :: Pluteus (n.) The free-swimming larva of sea urchins and ophiurans, having several long stiff processes inclosing calcareous rods..
Urchon :: Urchon (n.) The urchin, or hedgehog..
Tangle :: Tangle (v.) An instrument consisting essentially of an iron bar to which are attached swabs, or bundles of frayed rope, or other similar substances, -- used to capture starfishes, sea urchins, and other similar creatures living at the bottom of the sea..
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