Roux spatula serum is a term commonly used in the field of cosmetic chemistry. The IPA phonetic transcription of this term is /ru spætjulə sɪrəm/. The word "roux" refers to a type of sauce made from flour and fat, while "spatula" is a tool used for mixing and spreading creams or gels. Finally, "serum" is a skincare product that is typically applied to the face. Together, these words combine to describe a cosmetic tool used for mixing and applying skincare solutions.
Behring serum, diphtheria antitoxin.
A practical medical dictionary. By Stedman, Thomas Lathrop. Published 1920.