in the PONS Dictionary
rayo [ˈrraɟo] N m
1. rayo (de luz):
2. rayo t. PHYS (radiación):
- rayos alfa
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- rayos anódicos
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- rayos beta
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- rayos catódicos
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- rayos gamma
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- rayos infrarrojos
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- rayos ultravioleta(s)
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- rayos X
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