Modulin

Modulin may refer to:
 * Modulen, The brand of dietary supplement by Nestlé designed for persons with Crohn's disease
 * Phenol-soluble modulin, a family of protein toxins
 * Toll-like receptor and TLR 2, proteins of which some were previously classified as "modulins"
 * A musical instrument that is a monophonic analogue homebuilt theremin/violin-esque synthesizer, invented by the band Wintergatan