Zone Refining

Science / Chemistry / Zone Refining: A method for purifying solids based on the fact that solutes tend to concentrate in the liquid when a solution is frozen. A solid bar is drawn slowly over a heat source and melted in a narrow band; impurities are carried along in the melted band until the end of the bar is reached.

Other Words for Zone

Zone Noun Synonyms: area, quarter, district, region, sector, section, sphere, belt, territory, province, realm, domain, precinct, bailiwick, department, terrain, circle, locality, locale, turf
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Surf Zone

Science / Geology / Surf Zone: An area of breaking waves bounded by the point of first breakers, then landward to the maximum uprush of waves on the beach. MORE

Sunlight Zone

Science / Marine Biology / Sunlight Zone: See Photic Zone. MORE

Subduction Zone

Science / Geology / Subduction Zone: An area at a convergent plate boundary where an oceanic plate is being forced down into the mantle beneath another plate. These can be identified by a zone of progressively deeper earthquakes. MORE

Target Heart Rate Zone

Health / Fitness / Target Heart Rate Zone: The number of heartbeats per minute reflecting the exercise intensity that gains the maximum training benefits from an aerobic workout. The formula for obtaining a target heart rate equals 220 minus y MORE

Target Zone Arrangement

Business / Finance / Target Zone Arrangement: In the context of takeovers, the price at which an acquirer aims to buy a target firm. In the context of options, the price of the underlying security at which an option will become in the money. In t MORE

Wash Zone

Science / Marine Biology / Wash Zone: The depth zone in which sediments are disturbed by wave action near the shoreline MORE

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