Ultraviolet
/ˌʌltrəˈvaɪəlɪt/
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Definition
(adj) Of electromagnetic radiation beyond (higher in frequency than) light visible to the human eye; radiation with wavelengths from 380 to 10 nanometres.
Sentence Examples
Ultraviolet rays are harmful to us.
Ultraviolet rays can cause skin cancer.
CEFR Practice Quiz
It is very important to wear sunscreen to protect your skin from the harmful ____ rays of the hot summer sun today.