1) Poetic form 
Quinzaine is an unrhymed verse of fifteen syllables. The word comes from the French word quinze, meaning fifteen. The syllables are distributed over three lines so that there are seven syllables in the first line, five in the second line, and three in the third line (7/5/3). The first line makes a statement. The next two lines ask a question relat...
piece of verse having fifteen lines
• (n.) The fifteenth day after a feast day, including both in the reckoning.
Quin'zaine noun [ French, from quinze fifteen, Latin quindecim . See Fifteen .] The fifteenth day after a feast day, including both in the reckoning. [ Written also quinzain .]