is an adjective
with at least two meanings. First, it can mean "in the usual place" to refer to medical
objects. It is the opposite of ectopic
, which means "not in the usual place" (such as an ectopic pregnancy
Second, it can mean entoptic, that is "visible because of something within the eye" or "visible without an external stimulus". This meaning arises from a typographical error.
Both meanings, however, can be supported etymologically: the words entopic and entoptic both have Greek roots; en means "in"; topos means "place", ento or ent- means "within" and optic refers to "sight" or "eye".
Entopic graphomania is a surrealist method in which dots are made at the sites of impurities in a blank sheet of paper, and lines are then made between the dots.