Release of mature sperms from Sertoli cells is called spermiogenesis/spermiation.

Explanation

**Step-by-Step Solution:**

1. **Understanding the Context**: The question asks about the release of mature sperm from Sertoli cells. It's important to differentiate between the processes involved in sperm development.

2. **Spermatogenesis Overview**: Sperm production begins with spermatogonia, which undergo several stages of development to become mature sperm. This process occurs in the seminiferous tubules of the testes.

3. **Role of Sertoli Cells**: Sertoli cells are essential for nurturing developing sperm cells. They provide nutrients and support to the immature sperm, facilitating their maturation.

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