dactyl

noun

1. （诗歌的）扬抑抑格，长短短格
   a unit of sound in poetry consisting of one strong or long syllable followed by two weak or short syllables

1. The megalopa of S.serrata has dactyl lower margin on the fifth abdominal segment which is different from three other Scylla species.
   花脚蟳大眼幼体在第五腹节具有指状下缘，与其他三种明显不同。

noun

1. a finger or toe in human beings or corresponding body part in other vertebrates

   Synonym:    digit

2. a metrical unit with stressed-unstressed-unstressed syllables