wardroom

Etymology

ward + room

noun

1. (nautical) The living quarters of a ship designated for the commissioned officers other than the captain.
   There were only about a dozen officers in the great wardroom, six of them in the khaki gabardine working uniform of the U.S. Navy. 1957, Neville Shute, chapter 1, in On the Beach, New York: William Morrow & Co
2. (nautical) The commissioned officers of a ship, excluding the captain.
   The captain rarely referred to his wardroom for advice, and this resulted in their discontent.
   […] it having also reached the ears of the Ward-room that the work contained reflections somewhat derogatory to the dignity of the officers, the volume was seized by the master-at-arms, armed with a warrant from the Captain. 1850, Herman Melville, chapter 11, in White-Jacket, New York: Harper, published 1855, page 56