Egocentric means viewing oneself as the center of everything.
Egocentric comes under adjective.
Synonyms: self-absorbed, self-serving, self-absorbed, self-centered, self-concerned, megalomania, narcissistic.
Antonyms: altruistic, modest, unselfish, generous.
Mr. Ravi is the most egocentric person I know; he thinks the entire universe revolves around him.
It is quite normal for a baby or a small child to be very egocentric.