• Webster's Revised Unabridged Dictionary
    • n. pl Aptera (Zoöl) Insects without wings, constituting the seventh Linnæn order of insects, an artificial group, which included Crustacea, spiders, centipeds, and even worms. These animals are now placed in several distinct classes and orders.
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Century Dictionary and Cyclopedia
    • aptera In zoology, a group to which various limits have been assigned. In the Linnean system of classification, the seventh and last order of Insecta, including “insects” without wings, that is, crustaceans, arachnidans, myriapods, etc. In 1795 it was divided by Latreille into seven orders: Suctoria, Thysanura, Parasita, Acephala, Entomostraca, Crustacea, and Myriapoda.
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Webster's Revised Unabridged Dictionary
NL. aptera, fr. Gr. without wings; 'a priv. + wing, to fly


In literature:

Semina aptera pube fibroso-mucosa tecta!
"Expedition into Central Australia" by Charles Sturt
Campodea is one of the bristle-tailed or thysanurous insects of the order Aptera (q.v.).
"Encyclopaedia Britannica, 11th Edition, Volume 5, Slice 2" by Various
Many Aptera are covered with flattened scales like those of moths.
"Encyclopaedia Britannica, 11th Edition, Volume 2, Slice 3" by Various

In news:

A motorcycle classification and Aptera's electric drivetrain also fulfill his dream of developing a car that's legal to drive solo in California carpool lanes.
Competitors included Li-ion Motors Wave II battery electric car, TW4XP battery electric car, and Aptera 2e battery electric car.
Aptera's controversial 2e electric vehicle is one step closer to production.
Aptera 2e Production Version Unveiled .