NARWHAL n.
usually has one long, twisted, pointed canine tooth, or tusk projecting forward from the upper jaw like a horn, whence it is called also sea unicorn, unicorn fish, and unicorn whale. Sometimes two horns are developed, side by side.
NIAGARA PERIOD n.
A subdivision or the American Upper Silurian system, embracing the Medina, Clinton, and Niagara epoch. The rocks of the Niagara epoch, mostly limestones, are extensively distributed, and at Niagara Falls consist of about eighty feet of shale supporting a greater thickness of limestone, which is gradually undermined by…
OPEN a.
to an uninterrupted, or Ant: closed circuit. -- Open communion, communion in the Lord's supper not restricted to persons who have been baptized by immersion. Cf. Close communion, under Close, a. -- Open diapason (Mus.), a certain stop in an organ, in which the pipes or tubes are formed like the mouthpiece of a flageo…
OVER a.
Upper; covering; higher; superior; also, excessive; too much or too great; -- chiefly used in composition; as, overshoes, overcoat, over-garment, overlord, overwork, overhaste.