(mathematics) (of an algebra) containing a multiplicative identity element (or unit), i.e. an element 1 with the property 1x = x1 = x for all elements x of the algebra.

Misspelling of discontinuous.

The state of being permanent. / (physics) The reciprocal of magnetic inductance.

An aircraft made to a smaller scale, either as a static (non-flying) model, or built to fly with the aid of an engine or electric motor, and controlled by radio from the ground.