What does the root word zo mean?

The root word "zo" doesn't have a specific meaning on its own. It's often part of a larger word, and its meaning depends on the context.

For example, "zoo" comes from the Greek word "zoon," meaning "animal," and "zodiac" comes from the Greek word "zodiakos," meaning "circle of animals."

If you provide the full word you are interested in, I can help you understand the meaning of the "zo" root.