Moderato

n. [ L.: cf. F. modérateur. ] 1. One who, or that which, moderates, restrains, or pacifies. Sir W. Raleigh. [ 1913 Webster ]

Angling was . . . a moderator of passions. Walton. [ 1913 Webster ]

2. The officer who presides over an assembly or discussion to preserve order, propose questions, regulate the proceedings, and declare the votes. [ 1913 Webster ]

3. In the University of Oxford, an examiner for moderations; at Cambridge, the superintendant of examinations for degrees; at Dublin, either the first (senior) or second (junior) in rank in an examination for the degree of Bachelor of Arts. [ 1913 Webster ]

4. A mechanical arrangement for regulating motion in a machine, or producing equality of effect. [ 1913 Webster ]