Stearinrich
Stearinrich is a term that appears to be a portmanteau of "stearin" and "rich." Stearin is a fatty acid, specifically a triglyceride of stearic acid, and is a primary component of animal fats and many vegetable oils. It is known for its waxy solid nature at room temperature. When combined with "rich," the term "stearinrich" would logically describe something that has a high concentration or abundance of stearin.
In the context of materials science or chemistry, a "stearinrich" substance might refer to a lipid mixture