Englishfor English speakers
laser
Noun
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A laser is a device that emits light through a process of optical amplification based on the stimulated emission of electromagnetic radiation.
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The term laser originated as an acronym for "light amplification by stimulated emission of radiation".
column
Noun
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A column is a support that is standing up and is built to support something, usually on a building.
The White House was built with several columns on the front side of the building to help support the building and prevent it from falling down.
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A column is a line of items in a table that goes from top to bottom.
The title of the second column in the table is "Population in 2009".
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A column is a body of troops that are strung out along a road.
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A column is a body of text in a newspaper that goes from top to bottom.