Stepgrandchild, also known as "step-grandbaby," is a term that refers to a grandchild who is the child of one's spouse or partner. Other synonyms for stepgrandchild include "bonus grandchild," "blended family grandchild," or "grandchild by marriage." The word stepgrandchild is used to describe a child who is not biologically related to their grandparent but is still part of their family. It is a common term used in modern society, where stepfamilies and blended families are becoming more prevalent. Regardless of the term used, stepgrandchildren are just as important and loved as biological grandchildren and should always be treated with the same amount of love and care.