Mo. Rev. Stat. § 150.020
Current with changes from the 2023 Legislative Session
The term "merchant", as used in sections 150.010 to 150.290, shall be construed to include all merchants, commission merchants, grocers, manufacturers and dealers in drugs and medicines, except physicians for medicines used in their practice, whether trading as wholesale or retail dealers.
§ 150.020, RSMo
RSMo 1939 § 11327, A.L. 1945 p. 1838