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|n. pl.||1.||(Zool.) division of insects (Zool.) reticulated wings, as in the Neuroptera, but having an active pupa state. It includes the dragon flies, May flies, white ants, etc. By some Zoologists they are classed with the Orthoptera; by others, with the Neuroptera.|
Webster's Revised Unabridged Dictionary, published 1913 by G. & C. Merriam Co.