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".
beam
Noun
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A beam is a line of light or energy.
A beam of sunlight came through the window making a rectangle on the floor.
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A beam is a long straight piece of wood or metal used in building to support weight.
Inside, the ceiling of the tunnel was held up with beams and was high enough that we could stand.
beam
Verb
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If you beam a signal from one place to another, you send it through the air.
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If you beam, you smile and look very happy.
excitation
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noun
(= excitement)
something that agitates and arouses
he looked forward to the excitements of the day
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noun
the neural or electrical arousal of an organ or muscle or gland
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noun
(= excitement, inflammation)
the state of being emotionally aroused and worked up
his face was flushed with excitement and his hands trembled
he tried to calm those who were in a state of extreme inflammation