pareidolianoun [ U ]
/ˌpær.ɪˈdəʊl.jə//ˌper.aɪˈdoʊl.jə/specializeda situation in which someone sees a pattern or image of something that does not exist, for example a face in a cloud:
Religious pareidolia is when the eye sees religious images in objects such as tree trunks and grilled cheese sandwiches.