Parnassian describes poetry linked to the French Parnassian movement, which valued polished form, technical control, and a detached, impersonal tone. Parnassian poems often favor exact rhyme, balanced lines, and carefully finished language over open emotion or personal confession.
The word can also be used more loosely for verse that is highly crafted and formal in style.
Example
The marble fountain glints at noon,
its shadow cut in perfect rhyme;
the verse is cool, exact, and still,
like chiseled steps of measured time.