The Collaborative International Dictionary of English v.0.48:

Luz \Luz\ (l[u^]z), n.
   A bone of the human body which was supposed by certain
   Rabbinical writers to be indestructible. Its location was a
   matter of dispute. --Brande & C.
   [1913 Webster]

Easton's 1897 Bible Dictionary:

Luz
   a nut-bearing tree, the almond. (1.) The ancient name of a royal
   Canaanitish city near the site of Bethel (Gen. 28:19; 35:6), on
   the border of Benjamin (Josh. 18:13). Here Jacob halted, and had
   a prophetic vision. (See BETHEL.)

     (2.) A place in the land of the Hittites, founded (Judg. 1:26)
   by "a man who came forth out of the city of Luz." It is
   identified with Luweiziyeh, 4 miles north-west of Banias.


Hitchcock's Bible Names Dictionary (late 1800's):

Luz, separation; departure; an almond