racemo

Adjective

 * 1)  Of a tactic diad, having structural units in opposition.

Usage notes
As the adjectives "racemic" and "nonracemic" apply to whole molecules, not structural units, "racemo" is considered misleadingly imprecise and was formally proscribed in 2019; modern usage is to write just "r", formerly an abbreviation for "racemo".

Etymology
. Compare, a related inherited form.

Noun

 * 1)  raceme
 * 2)  racemate