Acy or ACY may refer to:
Acy-Romance is a French commune in the Ardennes department in the Grand Est region of northern France.
Acyl-homoserine-lactone acylase (EC 220.127.116.11, acyl-homoserine lactone acylase, AHL-acylase, AiiD, N-acyl-homoserine lactone acylase, PA2385 protein, quorum-quenching AHL acylase, quorum-quenching enzyme, PvdQ, QuiP) is an enzyme with systematic name N-acyl-L-homoserine-lactone amidohydrolase.
Acyrthosiphon pisum, commonly known as the pea aphid (and colloquially known as the green dolphin, pea louse, and clover louse ), is a sap-sucking insect in the Aphididae family.
Acy is a French commune in the department of Aisne in the Hauts-de-France region of northern France.
Acyrtus is a genus of clingfishes found in the western Atlantic Ocean.
Aminoacylase-1 is an enzyme that in humans is encoded by the ACY1 gene.
Acyl-CoA thioesterase 9 is a protein that is encoded by the human ACOT9 gene. It is a member of the acyl-CoA thioesterase superfamily, which is a group of enzymes that hydrolyze Coenzyme A esters.
Acyphoderes fulgida is a species of beetle in the family Cerambycidae. It was described by Chemsak and Linsley in 1979.
In organic chemistry, an acyl chloride (or acid chloride) is an organic compound with the functional group -COCl.