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What is "palisade worm"

The Collaborative International Dictionary
Palisade worm

Palisade \Pal`i*sade"\, 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.

  2. Any fence made of pales or sharp stakes.

  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.

    Palisade cells (Bot.), vertically elongated parenchyma cells, such as are seen beneath the epidermis of the upper surface of many leaves.

    Palisade worm (Zo["o]l.), a nematoid worm ( Strongylus armatus), parasitic in the blood vessels of the horse, in which it produces aneurisms, often fatal.