An aulos (Greek αὐλός, plural αὐλοί, auloi) or tibia (Latin) was an . Different kinds of instruments bore the name, including a single pipe without a reed called the monaulos (μόναυλος, from μόνος "single"), and a single pipe held horizontally, as the modern flute, called the plagiaulos (πλαγίαυλος, from πλᾰγ&… (More on Aulos)