Science / Weather / Cold Wave: A rapid fall in temperature within twenty-four hours to temperatures requiring substantially increased protection to agriculture, industry, commerce, and social activities. National Weather Service criteria includes the rate of temperature fall and the minimum to which it falls, depending on the region of the country and time of the in year. The Weather Channel uses the following criteria for a cold wave: a cold spell of two days or more with below normal temperatures in at least fifteen states, with at least five of them more than fifteen degrees below normal.
Cold Adjective Synonyms: chill, chilly, frosty, icy, keen, nippy, freezing, frigid, ice-cold, stone-cold, bitter, bitter-cold, raw, biting, biting-cold, numbing, gelid, wintry, hibernal, brumal, arctic, glacial, polar, hyperborean or hyperboreal, Siberian
Cold Noun Synonyms: head or chest or common cold, influenza, ague, (la or the) grippe, coryza, gravedo, sniffles, the flu, bug, sneezles and wheezles
Wave Adjective Synonyms: swell, undulation, billow, sea, heave, roller, whitecap, white horse, ripple, wavelet, breaker, comber
Science / Tides and Currents / Shallow Water Wave: A wave is classified as a shallow water wave whenever the ratio of the depth (the vertical distance of the still water level from the bottom) to the wave length (the horizontal distance between crests MORE
Science / Geology / Seismic Surface Wave: A seismic wave that follows the earth's surface only, with a speed less than that of S-waves. There are Raleigh waves (forward and vertical vibrations) and Love waves (transverse vibrations). MORE