noun
syllabic meter
Technical term in Japanese poetics referring to meter based on syllable count (morae), as in haiku and tanka.
俳句は五・七・五の音数律に従う。
Haiku follows a 5-7-5 syllabic meter.
韻律 is a broader term for poetic meter or rhythm in general, while 音数律 specifically refers to meter based on syllable count.
Compound of 音数 (syllable count) and 律 (rule, meter).