/ten"deuhn/ , n.
1. Anat. a cord or band of dense, tough, inelastic, white, fibrous tissue, serving to connect a muscle with a bone or part; sinew.
2. a reinforcing strand in prestressed concrete.
[ 1535-45; tendon- (s. of tendo ) ténon sinew (sp. with -d- by association with L tendere to stretch) ]