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tardigrade

[tahr-di-greyd] /ˈtɑr dɪˌgreɪd/
noun
1.
Also called bear animalcule, water bear. any microscopic, chiefly herbivorous invertebrate of the phylum Tardigrada, living in water, on mosses, lichens, etc.
adjective
2.
belonging or pertaining to the phylum Tardigrada.
3.
slow in pace or movement.
Origin of tardigrade
1615-1625
1615-25; < Latin tardigradus slow-paced. See tardy, -grade
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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British Dictionary definitions for tardigrade

tardigrade

/ˈtɑːdɪˌɡreɪd/
noun
1.
any minute aquatic segmented eight-legged invertebrate of the phylum Tardigrada, related to the arthropods, occurring in soil, ditches, etc Popular name water bear
adjective
2.
of, relating to, or belonging to the Tardigrada
Word Origin
C17: via Latin tardigradus, from tardus sluggish + gradī to walk
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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tardigrade in Science
tardigrade
  (tär'dĭ-grād')   
Any of various slow-moving, minute invertebrates of the phylum Tardigrada. Tardigrades have a head and four fused body segments, each of which has a pair of stubby legs ending in claws. They live in water, damp moss, flower petals, or sand, and are usually 1 mm (0.04 inches) or less in size. Tardigrades are able to resist extremely low temperature, pressure, and humidity, and go into dormant states for months or years. They are believed to be intermediate in evolutionary development between annelids and arthropods. Also called water bear.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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