No, zinc oxide (ZnO) is not an acid anhydride. Here's why:

* Acid anhydrides are oxides that react with water to form an acid. They typically involve nonmetals or metalloids.

* Zinc oxide is a basic oxide. When it reacts with water, it forms zinc hydroxide (Zn(OH)₂), a base:

ZnO + H₂O → Zn(OH)₂

In summary: Acid anhydrides form acids with water, while basic oxides like zinc oxide form bases.