Easton's Bible Dictionary (1897)/Son of man
(2.) It is a title frequently given to the prophet Ezekiel , probably to remind him of his human weakness.
(3.) In the New Testament it is used forty-three times as a distinctive title of the Saviour. In the Old Testament it is used only in Ps. 80:17 and Dan. 7:13 with this application. It denotes the true humanity of our Lord. He had a true body (Heb. 2:14; Luke 24:39) and a rational soul. He was perfect man.