on·lay 
(ŏnlā′, ôn-)
(ŏnlā′, ôn-)n.
1. Something laid or applied over something else, as to add relief to a surface.
2. Medicine A graft applied to the surface of a recipient organ or structure.
3. Dentistry A cast, usually made of metal, attached to the surface of a tooth.
- transudation
- transudatory
- transude
- transuranic
- transuranium
- transuranium element
- transurethral
- Transvaal
- transvaluation
- transvalue
- transversal
- transverse
- transverse arch
- transverse colon
- transverse dune
- transverse flute
- transversely
- transverseness
- transverse process
- transversion
- transvestism
- transvestite
- transvestitism
- trans woman
- transwoman