palisade \pal`isade"\, n. f. palissade, cf. sp. palizada, it.
   palizzata, palizzo, ll. palissata; all fr. l. palus a stake,
   pale. see pale a stake.
   1. fort. a strong, long stake, one end of which is set
      firmly in the ground, and the other is sharpened; also, a
      fence formed of such stakes set in the ground as a means
      of defense.
      1913 webster

   2. any fence made of pales or sharp stakes.
      1913 webster

   3. a line of bold cliffs, esp. one showing basaltic columns;
      -- usually in pl., and orig. used as the name of the
      cliffs on the west bank of the lower hudson.
      webster 1913 suppl.

   palisade cells bot., vertically elongated parenchyma
      cells, such as are seen beneath the epidermis of the upper
      surface of many leaves.

   palisade worm zool., a nematoid worm strongylus
      armatus, parasitic in the blood vessels of the horse, in
      which it produces aneurisms, often fatal.
      1913 webster
see also:
pale palisade cells palisade worm strongylus armatus