Nauplius, naw′pli-us, n. a stage of development of low Crustaceans, as cirripeds, &c.:—pl. Nau′plii.—adjs. Nau′pliiform, Nau′plioid. [L., a kind of shell-fish—Gr. Nauplios, a son of Poseidon, naus, a ship, plein, to sail.]

Nauropometer, naw-rō-pom′e-tėr, n. an instrument for measuring a ship's heeling or inclination at sea. [Gr. naus, a ship, hropē, inclination, metron, measure.]

Nauscopy, naw′skop-i, n. the art of sighting ships at great distances. [Gr. naus, a ship, skopein, to see.]

Nausea, naw′she-a, n. sea-sickness: any sickness of the stomach, with a tendency to vomit: loathing.—adj. Nau′seant, producing nausea.—n. a substance having this quality.—v.i. Nau′seāte, to feel nausea or disgust.—v.t. to loathe: to strike with disgust.—n. Nauseā′tion.—adjs. Nau′seātive, causing nausea or loathing; Nau′seous, producing nausea: disgusting: loathsome.—adv. Nau′seously.—n. Nau′seousness. [L.,—Gr. nausia, sea-sickness—naus, a ship.]

Nautch, nawch, n. a kind of ballet-dance performed by professional dancers known as Nautch′-girls in India: any form of stage entertainment with dancing. [Hind. nāch, dance.]

Nautical, naw′tik-al, adj. of or pertaining to ships, to sailors, or to navigation: naval: marine.—adv. Nau′tically.—Nautical almanac, an almanac giving information specially useful to sailors; Nautical mile, one-sixtieth of a degree measured at the Equator (=about 2025 yards). [L. nauticus—Gr. nautikosnaus; cog. with L. navis, a ship.]

Nautilus, naw′ti-lus, n. a Cephalopod found in the southern seas, once believed to sail by means of the expanded tentacular arms: a kind of diving-bell sinking or rising by means of condensed air:—pl. Nau′tiluses, or Nau′tili.—adjs. Nau′tiliform, Nau′tiloid.—Paper nautilus, any species of Argonauta. [L.,—Gr. nautilos, a sailor.]

Naval, nā′val, adj. pertaining to ships: consisting of, or possessing, ships: marine: nautical: belonging to the navy.—Naval brigade, a body of seamen so arranged as to be able to serve on land; Naval officer, an officer on board a man-of-war: a custom-house officer of high rank in the United States; Naval tactics, the science and methods of managing and moving squadrons of ships. [Fr.,—L. navalisnavis, a ship.]

Nave, nāv, n. the middle or main body of a church, distinct from the aisles or wings.—n. Nā′varch, a Greek admiral. [Fr. nef—L. navis, a ship.]

Nave, nāv, n. the hub or piece of wood, &c., in the centre of a wheel, through which the axle passes.—v.t. to form as a nave. [A.S. nafu, nave; cf. Dut. naaf, Ger. nabe.]