What is "cerebro"

In the Marvel Universe, Cerebro ( Spanish and Portuguese for " brain") is a device that the X-Men (in particular, their leader, Professor Charles Xavier) use to detect humans, specifically mutants. It was created by Professor X and Magneto, and was later enhanced by Dr. Hank McCoy. The current version of Cerebro is called Cerebra, to be distinguished from the character of the same name. Cerebro first appeared in X-Men (vol 1) #7 (1964).