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Meaning of rachis

ra•chis

Pronunciation: (rā'kis), [key]
— pl. ra•chis•es, rach•i•des
    1. the axis of an inflorescence when somewhat elongated, as in a raceme.
    2. (in a pinnately compound leaf or frond) the prolongation of the petiole along which the leaflets are disposed.
    3. any of various axial structures.
  1. the part of the shaft of a feather bearing the web. See illus. under
  2. See
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.
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