Pronunciation: (pik"ē-yOOn', pik"u-),[key] —adj.Also,pic"a•yun'ish.Informal. 1. of little value or account; small; trifling: a picayune amount. 2. petty, carping, or prejudiced: I didn't want to seem picayune by criticizing.
—n. 1. (formerly, in Louisiana, Florida, etc.) a coin equal to half a Spanish real.
2. any small coin, as a five-cent piece.
3. Informal.an insignificant person or thing.
Pronunciation: (pik"u-yOOn', pik"ē-),[key] —n. a town in SE Mississippi. 10,361.