You searched for: “inclusion
inclusion (in KLOO zhuhn) (s) (noun), inclusions (pl)
1. The incorporation of one substance into the body of a different composition: The geologists were excited about the inclusions they discovered in the mass of lava that covered the hillside.
2. The involvement of individuals in the activity of others: Hester always insisted on the inclusion of her cousins in family holiday events because she was trying to be sure everyone felt welcome and had a good time.