
1) Animal order 2) Order of apterygota 3) Order thysanura
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https://www.crosswordclues.com/clue/thysanura

Thysanura is an order of the class insecta, encompassing silverfish and firebrats, best known for their three long caudal filaments. The families Machilidae and Meinertellidae of the jumping bristletails were once included with Thysanura. Occasionally, the correspondingly restricted order Thysanura is referred to as Zygentoma. ==Etymology== The na...
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http://en.wikipedia.org/wiki/Thysanura

• (n. pl.) An order of wingless hexapod insects which have setiform caudal appendages, either bent beneath the body to form a spring, or projecting as bristles. It comprises the Cinura, or bristletails, and the Collembola, or springtails. Called also Thysanoura. See Lepisma, and Podura.
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http://thinkexist.com/dictionary/meaning/thysanura/

<zoology> An order of wingless hexapod insects which have setiform caudal appendages, either bent beneath the body to form a spring, or projecting as bristles. It comprises the Cinura, or bristletails, and the Collembola, or springtails. Called also Thysanoura. See Lepisma, and Podura. ... Origin: NL, fr. Gr. Fringe + tail. ... Source: Webste...
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http://www.encyclo.co.uk/local/20973
Thys`a·nu'ra noun plural [ New Latin , from Greek ... fringe + ... tail.]
(Zoology) An order of wingless hexapod insects which have setiform caudal appendages, either bent beneath the body to form a spring, or projecting as bristles. It comprises the Cinura, or bristletails, and the Collembo...
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http://www.encyclo.co.uk/webster/T/54

The Thysanura is a sub-order of Apterygota, minute wingless insects of which five species occur in Britain. The Thysanura are found in damp earth, in rotten wood, and among other decaying vegetable matter. They are covered either with hairs or scales. There is no metamorphosis, the young hatching from their egg in the adult form. They have long, ma...
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http://www.probertencyclopaedia.com/browse/BT.HTM

[
n] - firebrats
Found on
http://www.webdictionary.co.uk/definition.php?query=Thysanura

the Thysanura (or three-pronged bristletails) are an Order of insects. They are wingless and possess three filaments at the end of the abdomen.
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https://www.amentsoc.org/insects/glossary/begins/with/t/
order Thysanura noun firebrats; silverfish; machilids
Found on
https://www.encyclo.co.uk/local/20974
No exact match found.