couplets

/K AH1 P L AH0 T S/
noun
  1. 1

    A pair of lines with rhyming end words.

  2. 2

    A pair of one-way streets which carry opposing directions of traffic through gridded urban areas.

    โ€œ5th Street is one-way west only and 6th Street is one-way east only. Together, they form a couplet in Downtown Los Angeles.โ€

  3. 3

    A pair of two mutually exclusive choices in a dichotomous key.

Synonyms

Source: https://en.wiktionary.org/wiki/couplet, https://en.wiktionary.org/wiki/couplets