Urchin is the old English term for hedgehog. As such, it is applied to many things that take a similar form to a hedgehog: Old English (also called Anglo-Saxon) is an early form of the English language that was spoken in parts of what is now England and southern Scotland between the mid-fifth century and the mid-twelfth century. ... Genera Atelerix Erinaceus Hemiechinus Mesechinus A hedgehog is any of a wide variety of small spiny mammals of the Order Insectivora found through parts of Europe, Asia, Africa, and New Zealand. ...
Children (especially boys) that behave in an annoying manner are commonly called urchins. This comes from the scrunched-face appearance of both hedgehogs and unruly children.
In old theater, urchin was a common name for an elf or fairy that took on a prickly appearance.
Urchins are annoying people who fester around others.
Urchins Loiter without INTENT
For a detailed etymology, see The Online Etymology Dictionary Subclasses Euechinoidea Superorder Atelostomata Order Cassiduloida Order Spatangoida (heart urchins) Superorder Diadematacea Order Diadematoida Order Echinothurioida Order Pedinoida Superorder Echinacea Order Arbacioida Order Echinoida Order Phymosomatoida Order Salenioida Order Temnopleuroida Superorder Gnathostomata Order Clypeasteroida (sand dollars) Order Holectypoida Perischoechinoidea Order Cidaroida (pencil urchins) Slate pencil urchin (cidaroid) Group of black... A small forest elf (älva) rescuing an egg, from Solägget (1932), by Elsa Beskow An elf is a mythical creature of Germanic mythology which survived in northern European folklore. ... by Sophie Anderson A fairy is a spirit (supernatural being) found in the legends, folklore, and mythology of many cultures. ... Dave Murray can refer to: Dave Murray: One of the guitarists for the heavy metal band Iron Maiden Dave Murray: A Canadian alpine skier who was one of the 1970s group of skiers known as the Crazy Canucks Dave Murray: KTVI chief meteorologist This is a disambiguation page — a navigational... Adrian Smith c. ... Iron Maiden are a British heavy metal band from east London. ...
Urchin Software Corporation is a San Diego, California based web analytics company, now acquired by Google Google, Inc (NASDAQ: GOOG), is a U.S. public corporation, initially established as a privately-held corporation in 1998, that designed and managed the Internet Google search engine. ...
As a result, the population of sea urchins has multiplied and they are chewing up the kelp forest in the area and upsetting the ecosystem.
Sea urchins are a favored organism for studies of development using a systems biology [1]approach, often in conjunction with gene knockdown studies using Morpholino antisense oligos [2].
Since the sea urchin is globular and radially symmetrical, and since like other organisms its early embryological stages are globular and radially symmetrical, it is surprising that its larval stage, known as a pluteus, is not.
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