This word is often used in the plural in sense 1).
1. (group of letters)
a. abbreviation (spelled out)
¿Qué significa la sigla ONG?What does the abbreviation NGO stand for?
b. acronym (pronounced as a word)
OTAN ha dejado de ser una sigla para convertirse en una palabra propiamente dicha.NATO has ceased being an acronym to become a word in its own right.
siglas (de)acronym (for)
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