tertiary

mastery
UK /ˈtɜː.ʃi.ə.ɹiː/ US /ˈtɝ.ʃiˌɛɹ.i/nounadjname

card 1 of 10 · context meaning

What does 'tertiaries' mean in this sentence?

The irrigation system distributes water from the main canal to secondaries and then to tertiaries.