PLATFORM n.
Any flat or horizontal surface; especially, one that is raised above some particular level, as a framework of timber or boards horizontally joined so as to form a roof, or a raised floor, or portion of a floor; a landing; a dais; a stage, for speakers, performers, or workmen; a standing place.
POISON n.
ubby Rhus diversiloba of California and Oregon. Poison sac. (Zoöl.) Same as Poison gland, above. See Illust. under Fang. -- Poison sumac (Bot.), a poisonous shrub of the genus Rhus (R. venenata); -- also called poison ash, poison dogwood, and poison elder. It has pinnate leaves on graceful and slender common petioles,…
POLE n.
assing around it, one end being fastened to the treadle, and the other to an elastic pole above. -- Pole mast (Naut.), a mast formed from a single piece or from a single tree. -- Pole of a lens (Opt.), the point where the principal axis meets the surface. -- Pole plate (Arch.), a horizontal timber resting on the tie…
PORPOISE n.
e, and the closely allied American species (P. Americana). The color is dusky or blackish above, paler beneath. They are closely allied to the dolphins, but have a shorter snout. Called also harbor porpoise, herring hag, puffing pig, and snuffer.
PRAIRIE n.
e that of a dog. Called also prairie marmot. -- Prairie grouse. Same as Prairie chicken, above. -- Prairie hare (Zoöl.), a large long-eared Western hare (Lepus campestris). See Jack rabbit, under 2d Jack. -- Prairie hawk, Prairie falcon (Zoöl.), a falcon of Western North America (Falco Mexicanus). The upper parts ar…