couplet
/ˈkʌp.lət/noun
Middle School
1
A pair of lines, typically with rhyming end words.
2
Ellipsis of antithetical couplet, Chinese couplet, or duilian couplet (“duilian”).
3
A pair of one-way streets which carry opposing directions of traffic through gridded urban areas.
4
A pair of two mutually exclusive choices in a dichotomous key.