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n.1.(Zool.) A beautiful South American humming bird (Gouldia Popelairii), having the six outer tail feathers long, slender, and pointed. The head is ornamented with a long, pointed crest.
Webster's Revised Unabridged Dictionary, published 1913 by G. & C. Merriam Co.
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Unusual for an AR-15-type rifle, the Jack comes complete with an Inforce WML (Weapon Mounted Light) and the unique Haley Strategic Thorntail Offset Adaptive Light Mount built by Impact Weapons Components.