any group or radical of the form RCO- where R is an organic group; "an example of the acyl group is the acetyl group"
Its definition shares important concepts with this word: insects, wings, constituting, seventh, linnaen.
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Aptera
Insects without wings, constituting the seventh Linnaen 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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