The name in Spanish is: "Participio"
Participle is the most used form of a verb and it is one of the three impersonal forms in Spanish (together with infinitive and gerund).
Examples:
jugado
played
caminado
walked
For the regular verbs, to build the participle is easy:
The main function of the participle is to build the compound tenses:
Indicative
Subjuntive