[ uh-krey-sin ]
/ əˈkreɪ sɪn /

noun Mycology.

a chemotactic substance, identical with cAMP, secreted by myxamebas of cellular slime molds and attracting other myxamebas to aggregate and form a pseudoplasmodium.

Origin of acrasin

1945–50; < New Latin Acras(iales) an order of cellular slime molds (Acras(is) a genus, so named from the lack of fusion between the cells (< Greek; see a-6, crasis) + -ales -ales) + -in2 Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019