Is it "la silla de rueda" or "la silla de ruedas" or both?

Question

The Spanish Dict com dictionary has no s but the lesson I just finished does not?

Answer 1

[RAE dictionary under silla]

~ de ruedas.

1. f. La que, con ruedas laterales grandes, permite que se desplace una persona imposibilitada.

Answer 2

In a medical environment, I have always used "silla de ruedas".

Answer 3

I would say ruedas just because the chair has more than one wheel.