Any of the bees of the genus Osmia, which have the habit of making compartments of mud in their nests.

plural of mass murderer

sacring-bell

In a masculine manner.

plural of mass spectrograph

plural of master-at-arms

plural of master chief petty officer

(physics, analytical chemistry) A mass spectrometer

(psychology) The sociopsychological phenomenon in which a large group of people exhibit the same or similar hysterical symptoms simultaneously.

plural of master sergeant