1. tenon - Noun
2. tenon - Verb
A projecting member left by cutting away the wood around it, and made to insert into a mortise, and in this way secure together the parts of a frame; especially, such a member when it passes entirely through the thickness of the piece in which the mortise is cut, and shows on the other side. Cf. Tooth, Tusk.
To cut or fit for insertion into a mortise, as the end of a piece of timber.
Source: Webster's dictionaryEarly Egyptians also knew how to fasten the planks of this ship together with mortise and tenon joints. Source: Internet
The joints between sections consist of a tenon fitting into a socket; the tenons are wrapped in either cork or string as a seal against air leaks. Source: Internet
There is a filled hole below her right breast that originally contained a metal tenon that would have supported the separately carved right arm. Source: Internet