5587clarions (historical aerophones)TTen-USVocabulário Colaborativo em Artes e Arquitetura active approved clarions (historical aerophones)Valveless brass aerophones with conical bores. These were used mostly in the military to give signals to the infantry. Now chiefly used to refer to trumpet-like instruments of this kind in the Middle Ages and Renaissance, distinguished from modern "bugles."

Source: Art & Architecture Thesaurus

http://vocab.getty.edu/page/aat/300400695

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