You can find the definition of "efectos especiales" in:
* Spanish dictionaries: Online dictionaries like WordReference, Collins, or RAE (Real Academia Española) provide definitions and examples.
* Spanish language learning websites: Websites like SpanishDict or Babbel offer translations and explanations.
* Film and television industry resources: Websites and books dedicated to the film industry will use and define "efectos especiales" in a specific context.
Examples:
* WordReference: https://www.wordreference.com/es/en/translation.asp?sp=efectos+especiales&lang=es
* RAE (Real Academia Española): https://dle.rae.es/efecto (although it doesn't specifically define "efectos especiales," it provides information on the general meaning of "efecto")
Remember that the specific meaning of "efectos especiales" can vary depending on the context.