Bible Encyclopedias
Rhacis
1911 Encyclopedia Britannica
or Rachis (Gr. paxcs, a backbone), in botany the axis of an inflorescence or of a branched leaf; in zoology, the stem of a feather, as opposed to the vesillum, or web.
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Bibliography Information
Chisholm, Hugh, General Editor. Entry for 'Rhacis'. 1911 Encyclopedia Britanica. https://www.studylight.org/encyclopedias/eng/bri/r/rhacis.html. 1910.