That which is similar to, or resembles, something else, as in quality, form, etc.

(homeopathy) A material that produces an effect that resembles the symptoms of a particular disease.

Having traits or characteristics in common; alike, comparable.

(mathematics) Having the same shape, in particular, having corresponding angles equal and corresponding line segments proportional.

(mathematics, linear algebra) Of two square matrices; being such that a conjugation sends one matrix to the other.