(philosophy) In Hegelianism, the spiritual principle of which the reality is the expression.

plural of gender identity disorder

plural of identity matrix

plural of identity matrix

plural of identity element

plural of ideal gas

(politics) Politics focusing on the self-interest and perspectives of people in various groupings, such as ethnicity, race, religion, gender, and sexual orientation.

(trigonometry) The equality sin (x)²+ cos (x)²=1, holding for all real and complex x, equivalent to the application of the Pythagorean theorem to the unit circle.

(mathematics) A theorem in the elementary theory of numbers: let a and b be integers, not both zero, and let d be their greatest common divisor. Then there exist integers x and y such that ax + by = d.

(mathematics) A certain kind of subset of a partially ordered set.