la onda - wave (of liquid, sound or electromagnetism)Spanish example: La luz, las microondas, los rayos X y las transmisiones de radio y televisión son todas formas de ondas electromagnéticas.
English example: Light, microwaves, X-rays and radio and television transmissions are all types of electromagnetic waves.
Source: la onda - wave (of liquid, sound or electromagnetism) (https://www.123teachme.com/spanish_feeds/word_of_the_day/2021/11/29)