parish at the mouth of the Mississippi in Louisiana, U.S., from Louisiana French, literally "persimmon" (18c.), probably from Miami/Illinois (Algonquian) piakimina.
Examples from the Web for plaquemines
News from officials in Plaquemines Parish indicated the capsule had been sighted and that the 11 workers were “safe and sound.”
Sheila Ratiff of Plaquemines Parish told me about her cousin who called her in tears.