Assistant

Part of speech: noun (n.)

1. One who, or that which, assists; a helper; an auxiliary; a means of help. Four assistants who his labor share. Pope. Rhymes merely as assistants to memory. Mrs. Chapone.

2. An attendant; one who is present. Dryden.

Part of speech: adjective (a.)

1. Helping; lending aid or support; auxiliary. Genius and learning . . . are mutually and greatly assistant to each other. Beattie.

2. Of the second grade in the staff of the army; as, an assistant surgeon. [U.S.]