• WordNet 3.6
    • n Thysanura firebrats; silverfish; machilids
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Webster's Revised Unabridged Dictionary
    • n. pl Thysanura (Zoöl) 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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Century Dictionary and Cyclopedia
    • n Thysanura The lowest order of hexapod insects, including primitive wingless ametabolous forms with simple eyes, living usually in damp places and under stones, and known as springtails and bristletails. In many species the tracheæ are wanting. It comprises in this sense the three suborders Collembola, Symphyla, and Cinura. See cuts under Campodea, silverfish, and springtail.
    • n Thysanura An order of less extent (when the Collembola are considered of ordinal rank, as by Lubbock), including only the families Japygidæ, Campodidæ, and Lepismatidæ, and corresponding to the suborder Cinura.
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Chambers's Twentieth Century Dictionary
    • n Thysanura this-a-nū′ra an order of wingless insects of small size, undergoing no metamorphosis, the abdomen usually bearing peculiar structures which seem to be abortive limbs, the spring-tails or bristle-tails
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Webster's Revised Unabridged Dictionary
NL., fr. Gr. fringe + tail
Chambers's Twentieth Century Dictionary
Gr. thysanos, a fringe, oura, a tail.


In literature:

Cinema: see Thysanura, of which this forms a group including the bristle-tails, and for which it has been used as an equivalent.
"Explanation of Terms Used in Entomology" by John. B. Smith
Handily, A. H., on Thysanura, 133.
"Our Common Insects" by Alpheus Spring Packard
Four families of Thysanura are usually recognized.
"Encyclopaedia Britannica, 11th Edition, Volume 2, Slice 3" by Various
It must also be observed that Prof. Westwood omits the parasitic Anoplura, as well as the Thysanura and Collembola.
"On the Origin and Metamorphoses of Insects" by Sir John Lubbock