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An accessory plume arising from the posterior side of the stem of the contour feathers of many birds; -- called also aftershaft. See Illust. of Feather.

One of the small nodules sometimes found in the neighborhood of the spleen; an accessory or supplementary spleen.

piece, as a coupling, an elbow, a valve, etc., used for connecting lengths of pipe or as accessory to a pipe. -- Pipe office, an ancient office in the Court of Exchequer, in which the clerk of the pipe made out leases of crown lands, accounts of cheriffs, etc. [Eng.] -- Pipe tree (Bot.), the lilac and the mock orange…

chief actor in a crime, or an abettor who is present at it, - - as distinguished from an accessory.

Of or pertaining to a spine or spines. Spinal accessory nerves, the eleventh pair of cranial nerves in the higher vertebrates. They originate from the spinal cord and pass forward into the skull, from which they emerge in company with the pneumogastrics. -- Spinal column, the backbone, or connected series or vertebræ…