1590s (v.), 1650s (n.), from in + lay. Related: Inlaid.
inlay in·lay (ĭn'lā', ĭn-lā')n.
A solid filling, as of gold or porcelain, fitted to a cavity in a tooth and cemented into place.
A graft of bone, skin, or other tissue.
An orthomechanical device inserted into a shoe.