Science / Biology / Photic Zone: The layer of the ocean that is penetrated by sunlight; extends to a depth of about 200 meters.
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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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Science / Marine Biology / Sunlight Zone: See Photic Zone. MORE
Science / Marine Biology / Mesopelagic Zone: Also called the 'twilight zone' of the ocean, this area from 200m to 1000m in depth, is bordered by the photic zone above and darkness below. It's in this zone where you start to see bioluminescence o MORE
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
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
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
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