Heat Wave

Science / Weather / Heat Wave: A period of abnormally and uncomfortably hot weather. It could last from several days to several weeks. The Weather Channel uses the following criteria for a heat wave: a minimum of ten states must have 90?°F plus temperatures and the temperatures must be at least five degrees above normal in parts of that area for at least two days or more.
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Other Words for Heat

Heat Noun Synonyms: warm (up)
Heat Adjective Synonyms: warmth, warmness, hotness, fever, fieriness, torridity or torridness
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Other Words for Wave

Wave Adjective Synonyms: swell, undulation, billow, sea, heave, roller, whitecap, white horse, ripple, wavelet, breaker, comber
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Roof Sheathing Or Sheeting

Business / Construction / Roof Sheathing Or Sheeting: The wood panels or sheet material fastened to the roof rafters or trusses on which the shingle or other roof covering is laid. MORE

Rossby Waves

Science / Weather / Rossby Waves: The movement of ridges and troughs in the upper wind patterns, primarily the jet stream, circling the earth. Named for Carl-Gustaf Rossby, a U.S. Weather Bureau (NWS) employee, who first theorized abo MORE

Refraction (Wave)

Science / Geology / Refraction (Wave): The departure of a wave from its original direction of travel at the interface with a material of different index of refraction (light) or seismic wave velocity (see also Seismic refraction). MORE