1911 Encyclopædia Britannica/Rhacis
RHACIS, or Rachis (Gr. ῥαχις, 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.
See also Rhacis on Wikipedia; and our 1911 Encyclopædia Britannica disclaimer.
RHACIS, or Rachis (Gr. ῥαχις, 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.