clause
clause (cláusula)
a group of words that has both a subject and a verb; it may or may not be a complete sentence.
Example
When the bus arrived, we got on. (Two clauses: when the bus arrived and we got on.)
In Spanish
clause (cláusula) — un grupo de palabras que tiene sujeto y verbo; puede ser o no una oración completa.
When the bus arrived, we got on. (Dos cláusulas: when the bus arrived y we got on.)