Dictionary » U » Urchin



1. (Science: zoology) A hedgehog.

2. (Science: zoology) A sea urchin. See sea urchin.

3. A mischievous elf supposed sometimes to take the form a hedgehog. We 'll dress [them] like urchins, ouphes, and fairies.

4. A pert or roguish child; now commonly used only of a boy. And the urchins that stand with their thievish eyes Forever on watch ran off each with a prize. (W. Howitt) You did indeed dissemble, you urchin you; but where's the girl that won't dissemble for an husband? (goldsmith)

5. 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.

(Science: zoology) Urchin fish, a diodon.

Origin: OE. Urchon, irchon, a hedgehog, OF. Irecon, ericon, herion, herichon, F. Herisson, a derivative fr. L. Ericius, from er a hedgehog, for her; akin to Gr. Cf. Herisson.

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Name game

Stegopontonia commensalis (Sea Urchin Shrimp) ~Just thought I could join in this game =]

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by Mikey
Sun Dec 28, 2008 4:22 am
Forum: General Discussion
Topic: Name game
Replies: 176
Views: 184823

Re: Developmental Biology-I need help

... and selecting search: PubMed. http://www.ncbi.nlm.nih.gov Katow H. Spatio-temporal expression of a Netrin homolog in the sea urchin Hemicentrotus pulcherrimus (HpNetrin) during serotonergic axon extension. Int J Dev Biol. 2008;52(8):1077-88. Wilson NH, Key B. Neogenin interacts ...

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by jonmoulton
Fri Nov 07, 2008 7:03 pm
Forum: Molecular Biology
Topic: Developmental Biology-I need help
Replies: 1
Views: 6004

Re: Morpholino review: how to knockdown

... of the MOs? I am curious whether this is a more common problem in vertebrates due to gene duplication because I have seen no evidence of it in sea urchin. If you weren't able to demonstrate that your MOs were cross-reacting, how can you be sure that the effects you observed were really "non-specific?" ...

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by snowcapk
Fri Aug 01, 2008 7:36 pm
Forum: Molecular Biology
Topic: Morpholino review: how to knockdown
Replies: 7
Views: 14981

Re: Morpholino review: how to knockdown

... and catastrophic non-specific effects do occur with some oligo sequences. Non-specific effects were carefully studied in a particular case in sea urchin: Coffman JA, Dickey-Sims C, Haug JS, McCarthy JJ, Robertson AJ. Evaluation of developmental phenotypes produced by morpholino antisense targeting ...

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by jonmoulton
Thu Jul 31, 2008 9:30 pm
Forum: Molecular Biology
Topic: Morpholino review: how to knockdown
Replies: 7
Views: 14981

Re: IBO 2003 questions- please help me out

... equally distant from a human protein. Here’s what I found.: Histone H1 (Human) is 72% identical to Xenopus (frog) H1 and 54% identical to Sea Urchin H1 DNA Polymerase A (Human) is 67% identical to Xenopus Polym A and 37% identical to Arabadopsis (a plant)—I didn’t see a sea urchin entry, but ...

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by blcr11
Tue May 13, 2008 10:29 pm
Forum: Cell Biology
Topic: IBO 2003 questions- please help me out
Replies: 9
Views: 11205
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