Here's why and what it could potentially mean:
* Misspelling: It could be a misspelling of "celdas," which means "cells" as in units of a larger structure (like a prison cell, a battery cell, or a cell in a honeycomb).
* Regionalism: "Celas" might be a local word used in a specific region of Spain or Latin America. Without more context, it's difficult to say for sure what it might mean.
To get a more accurate answer, you'll need to provide more context:
* What was the sentence or phrase where you encountered the word?
* What is the topic of the text or conversation?
With more information, we can better understand the intended meaning of "celas."