Massive waterfalls located on the Niagara River. / A city in New York near the Falls. / A city in Ontario near the Falls.

The nightingale, Luscinia megarhynchos.

Luscinia luscinia, a small passerine bird related to the common nightingale.

(inorganic chemistry) The silver salt of nitric acid, AgNO₃; it is sensitive to light and is used in the preparation of silver halides for photography; it is used in laboratories as a reagent to test for chloride

(inorganic chemistry) The ammonium salt of nitric acid, NH₄NO₃; it is used in fertilizers and explosives (notoriously in improvised explosive devices, though its main importance is as an explosive in its own right and in mixtures such as amatol and ANFO).

A period of darkness that occurs in winter in polar regions north from the Arctic Circle and south from the Antarctic Circle, and during which the sun stays below the horizon.

Alternative spelling of night-blind

(medicine) unable to see clearly in low light; suffering from night blindness.

The 92nd sura (chapter) of the Qur'an. / (Germanic paganism) The goddess of the night in Heathenry.

(US) Alternative form of nightstick