ten·on 
(tĕnən)
(tĕnən)n.
A projection on the end of a piece of wood shaped for insertion into a mortise to make a joint.
tr.v. ten·oned, ten·on·ing, ten·ons
1. To provide with a tenon.
2. To join with a tenon.
[Middle English, from Old French, from tenir, to hold, from Latin tenēre; see ten- in the Appendix of Indo-European roots.]
tenon