OVAL n.
whose distances from two fixed points is constant; -- so called from Cassini, who first investigated the curve. Thus, in the diagram, if P moves so that P A.P B is constant, the point P describes a Cassinian oval. The locus may consist of a single closed line, as shown by the dotted line, or of two equal ovals about th…
PALM n.
sap of several species of palms, especially, in India, of the wild date palm (Phoenix sylvestrix), the palmyra, and the Caryota urens. When fermented it yields by distillation arrack, and by evaporation jaggery. Called also palm toddy. -- Palm worm, or Palmworm. (Zoöl.) (a) The larva of a palm weevil.…
PHALANGOIDEA n.
A division of Arachnoidea, including the daddy longlegs or harvestman (Phalangium) and many similar kinds. They have long, slender, many-jointed legs; usually a rounded, segmented abdomen; and chelate jaws. They breathe by tracheæ. Called also Phalangides, Phalangidea, Phalangiida, and Opilionea.