gremial

from The Century Dictionary.

• Of or pertaining to the lap or bosom.
• Interior; pertaining to the internal affairs of a corporation or society, or confined to its members.
• noun A bosom friend; a confidant.
• noun One who is receiving nurture or education; specifically, a resident at a university.
• noun Eccles., a piece of cloth, originally a towel of fine linen, later a piece of silk or damask and often adorned with gold or silver lace, placed on the lap of a bishop, during mass or ordination, to protect his vestments from the consecrated oil. A similar vestment used by the Pope is called a subcinctorium.

from the GNU version of the Collaborative International Dictionary of English.

• adjective rare Of or pertaining to the lap or bosom.
• noun obsolete A bosom friend.
• noun (Ecol.) A cloth, often adorned with gold or silver lace, placed on the bishop's lap while he sits in celebrating mass, or in ordaining priests.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• adjective Of or pertaining to the lap
• noun A decorated cloth placed on a bishop's lap whilst celebrating mass or ordaining priests
• noun obsolete A bosom friend.