What does camero mean in spanish?

According to http://www.merriam-webster.com/dictionary/camera, it comes from a Late Latin Word for "room". So, Latin (and probably Spanish as well) "camera" = English "room".

If you're wondering the connection to the modern "camera" (as in digital camera, photographs, etc.), it comes from "Camera obscura" (Latin for "dark room"), an old sort of camera. http://en.wikipedia.org/wiki/Camera_obscura