Metric Ton

Business / Agriculture / Metric Ton: Usually abbreviated mt. Or MT, a metric ton is 2,204.62 pounds, compared to a short ton of 2,000 pounds. Generally, international agricultural trade data are cited in metric tons.

Long Ton

Business / Agriculture / Long Ton: A measure of weight equal to 2,240 pounds. By contrast, a short ton is 2,000 pounds: a metric ton equals 2,204.62 pounds. MORE

Short Ton

Business / Agriculture / Short Ton: Two thousand pounds. By contrast, a long ton equals 2,240 pounds. A metric ton equals 2,204.62 pounds. MORE

Pentatonic Scale

Entertainment / Music / Pentatonic Scale: Five-note pattern used in some African, Far Eastern and Native American musics: can also be found in Western music as an example of exoticism. MORE

Photon

Science / Chemistry / Photon: A discrete packet of energy associated with electromagnetic radiation. Each photon carries energy E proportional to the frequency nu of the radiation: E = hnu, where h is Planck's constant. MORE

Phytoplankton

Science / Biology / Phytoplankton: A fioating layer of photosynthetic organisms, including algae, that are an important source of atmospheric oxygen and form the base of the aquatic food chain. MORE

Piston Machine

Life Style / Coffee / Piston Machine: An espresso machine that uses a piston operated by a lever to force brewing water at high pressure through the compacted bed of ground coffee. MORE

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