Englishfor English speakers
Ca
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noun
(= calcium)
a white metallic element that burns with a brilliant light; the fifth most abundant element in the earth's crust; an important component of most plants and animals
CA
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noun
(= California)
a state in the western United States on the Pacific; the 3rd largest state; known for earthquakes
vapor
Noun
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A vapor is a cloudy or other matter in the air, like mist, steam or fumes.
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Vapor is the gas of something that used to be liquid or solid.
When you heat up water, vapor appears.
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".