PLOW; PLOUGH n.
Same as Charles's Wain. Ice plow, a plow used for cutting ice on rivers, ponds, etc., into cakes suitable for storing. [U. S.] -- Mackerel plow. See under Mackerel. -- Plow alms, a penny formerly paid by every plowland to the church. Cowell. -- Plow beam, that part of the frame of a plow to which the draught is appli…
PONDWEED n.
c plant of the genus Potamogeton, of which many species are found in ponds or slow-moving rivers. Choke pondweed, an American water weed (Anarcharis, or Elodea, Canadensis.) See Anacharis. -- Horned pondweed, the Zannichellia palustris, a slender, branching aquatic plant, having pointed nutlets.
POSITIVE a.
ee Municipal law, under Law. -- Positive motion (Mach.), motion which is derived from a driver through unyielding intermediate pieces, or by direct contact, and not through elastic connections, nor by means of friction, gravity, etc.; definite motion. -- Positive philosophy. See Positivism. -- Positive pole. (a) (El…
PURPRESTURE n.
y encroachment upon, or inclosure of, that which should be common or public, as highways, rivers, harbors, forts, etc. [Written also pourpresture.]
QUAY n.
A mole, bank, or wharf, formed toward the sea, or at the side of a harbor, river, or other navigable water, for convenience in loading and unloading vessels. [Written also key.]