This is the 8979th most frequent Spanish word.
ultraviolette
The word "ultraviolette" is not Spanish; it is French, meaning "ultraviolet" in English.
In this sentence, 'ultraviolette' is used as an adjective describing the type of light.
La luz ultraviolette no es visible para los ojos humanos.
Ultraviolet light is not visible to the human eyes.
Here, 'ultraviolette' describes the lamps that emit ultraviolet light.
El laboratorio utiliza lámparas ultraviolette para los experimentos.
The laboratory uses ultraviolet lamps for experiments.
In this example, 'ultraviolette' is used to specify the kind of radiation being researched.