(algebraic geometry) An ideal consisting of all polynomials (belonging to a certain polynomial ring) which zero out within a given algebraic variety.

ideally; if only it were possible.

Alternative form of idealistic

Giving rise to ideas.

In hyperbolic geometry, a triangle whose vertices are all ideal; i.e. points at infinity, rather than real.

Feelings, thoughts, contemplation of, a preoccupation with or a general desire for one's own suicide, or the idea of ceasing to exist.

plural of ideal triangle