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thysanura |
3 definitions found From Webster's Revised Unabridged Dictionary (1913) [web1913]: Insecta \In*sec"ta\, n. pl [NL. See {Insect}.] 1. (Zo["o]l.) One of the classes of Arthropoda, including those that have one pair of antenn[ae], three pairs of mouth organs, and breathe air by means of trache[ae], opening by spiracles along the sides of the body. In this sense it includes the Hexapoda, or six-legged insects and the Myriapoda, with numerous legs. See {Insect}, n. 2. (Zo["o]l.) In a more restricted sense the Hexapoda alone. See {Hexapoda}. 3. (Zo["o]l.) In the most general sense the Hexapoda, Myriapoda, and Arachnoidea, combined. Note: The typical Insecta, or hexapod insects, are divided into several orders viz.: {Hymenoptera}, as the bees and ants; {Diptera}, as the common flies and gnats; {Aphaniptera}, or fleas; {Lepidoptera}, or moths and butterflies; {Neuroptera}, as the ant-lions and hellgamite; {Coleoptera}, or beetles; {Hemiptera}, as bugs, lice, aphids; {Orthoptera}, as grasshoppers and cockroaches; {Pseudoneuroptera}, as the dragon flies and termites; {Euplexoptera}, or earwings; {Thysanura}, as the springtails, podura, and lepisma. See these words in the Vocabulary. From Webster's Revised Unabridged Dictionary (1913) [web1913]: Thysanura \Thys`a*nu"ra\, n. pl [NL., fr Gr ? fringe + ? tail.] (Zo["o]l.) 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}. From WordNet r 1.6 [wn]: Thysanura n : firebrats; silverfish; machilids [syn: {Thysanura}, {order Thysanura}]
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