What does dersive mean?

"Dersive" is not a recognized word in the English language. It's likely a misspelling or a word from a specialized field that isn't widely known.

Possible Misspellings:

* Derivative: This is the most likely word. It means something that is derived from something else, like a derivative of a mathematical function or a derivative work of art.

* Derisive: This means expressing or feeling contempt or ridicule.

If you provide more context or the sentence where you saw "dersive," I might be able to give you a more specific answer.