nematocystic

nematocyst

[nem-uh-tuh-sist, ni-mat-uh-]
noun Zoology.
an organ in coelenterates consisting of a minute capsule containing an ejectable thread that causes a sting.

Origin:
1870–75; nemato- + -cyst

nematocystic, adjective
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World English Dictionary
nematocyst (ˈnɛmətəˌsɪst, nɪˈmætə-)
 
n
a structure in coelenterates, such as jellyfish, consisting of a capsule containing a hollow coiled thread that can be everted to sting or paralyse prey and enemies
 
nemato'cystic
 
adj

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American Heritage
Medical Dictionary

nematocyst nem·a·to·cyst (něm'ə-tə-sĭst', nə-māt'ə-)
n.
A capsule within specialized cells of certain coelenterates containing a barbed, threadlike tube that delivers a paralyzing sting.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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American Heritage
Science Dictionary
nematocyst   (něm'ə-tə-sĭst', nĭ-māt'ə-sĭst')  Pronunciation Key 
One of the minute capsules in the tentacles of cnidarians, such as jellyfish, hydras, or sea anemones, used for stinging. The capsule is produced by a special cell (called a cnidoblast) and contains a tightly coiled barbed thread that quickly shoots forth if the capsule's lid is disturbed. The thread often contains poison.
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Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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