picayune
\ pik-ee-YOON, pik-uh- \ , adjective;
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 .
noun:
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.
Quotes:
...William Arthur Deacon, the more influential critic of the Toronto Globe and Mail , was equally picayune .
-- Mavis Gallant, "The Moslem Wife and Other Stories" , 1994
So she had never abandoned the Eucharist; without it, she felt the Mass, and all of the Church, would be only ideas she could get at home from books; and because of it, she overlooked what was bureaucratic or picayune about the Church.
-- Andre Dubus, "Dancing After Hours" , 1996
Origin:
Picayune is rooted in the Provençal word picaioun which meant "small copper coin." It is likely derivative of an onomatopoetic base pikk- which sounds like the process of beating and coining copper.
Dictionary.com