similar

Etymology

From French similaire, from Medieval Latin similaris, extended from Latin similis (“like”); akin to simul (“together”).

adj

1. Having traits or characteristics in common; alike, comparable.
   My new car is similar to my old one, except it has a bit more space in the back.
   Similar studies of rats have employed four different intracranial resorbable, slow sustained release systems—surgical foam, a thermal gel depot, a microcapsule or biodegradable polymer beads. 2013 May-June, Charles T. Ambrose, “Alzheimer’s Disease”, in American Scientist, volume 101, number 3, page 200
2. (mathematics) Having the same shape, in particular, having corresponding angles equal and corresponding line segments proportional.
3. (mathematics, linear algebra) Of two square matrices; being such that a conjugation sends one matrix to the other.

noun

1. That which is similar to, or resembles, something else, as in quality, form, etc.
2. (homeopathy) A material that produces an effect that resembles the symptoms of a particular disease.