(psychology) A psychological disorder characterized by the desire to have one or more healthy limbs amputated.

The false belief that random occurrences have a special connection to oneself.

(category theory) A unique morphism corresponding to each object of a category, which has its domain equal to its codomain, and which composed with any morphism (with which it is composable) gives that same morphism.

(category theory) A functor from a category to itself which maps each object of that category to itself and each morphism of that category to itself.

(of twins) being the result of two sperm cells fertilizing a single egg, which then splits into two embryos. They share all of the mother's genetic material but only half of the father's.

The act of self-identifying.

(transitive, chiefly in passive, or reflexive) To identify (oneself) with a particular person or group, or as part of a particular group.

plural of vehicle identification number

The set of roles and assumptions in a particular culture that are associated with gender and pertain to non-sexual activities, such as occupation, appropriate expressions of emotion, etc.

(politics) An advocate of or participant in identity politics.