Tonsure /(?)/

Ton·sure

Tonsure

n.
  1. The act of clipping the hair, or of shaving the crown of the head; also, the state of being shorn.
  2. The first ceremony used for devoting a person to the service of God and the church; the first degree of the clericate, given by a bishop, abbot, or cardinal priest, consisting in cutting off the hair from a circular space at the back of the head, with prayers and benedictions; hence, entrance or admission into minor orders. (R. C. Ch.)