A more thorough explanation:

vitricus

Vitricus is a historical term that refers to a stepfather.

1. After her mother's death, Jane's father remarried and she gained a vitricus.

2. The king's vitricus treated him as his own son and raised him to be a great ruler.

These examples show how vitricus was used to describe a stepfather in historical contexts. In the first example, Jane's father remarried and she gained a stepfather, or vitricus. In the second example, the king's stepfather, or vitricus, played an important role in his upbringing and helped shape him into a successful ruler.