instrument for measuring ship's rollings
• (n.) An instrument for measuring the angle through which a ship rolls or pitches at sea.
An apparatus for measuring oscillations of any kind, especially those of the bloodstream in sphygmometry. ... See: sphygmo-oscillometer. ... Origin: L. Oscillo, to swing, + G. Metron, measure ... (05 Mar 2000) ... 
(os″ĭ-lom´ә-tәr) an instrument for measuring oscillations.
Os`cil·lom'e·ter noun [ Latin oscillare to swing + -meter .] An instrument for measuring the angle through which a ship rolls or pitches at sea. 
Type: Term Pronunciation: os′i-lom′ĕ-tĕr Definitions: 1. An apparatus for measuring oscillations of any kind, especially those of the bloodstream in sphygmometry.
oscillometer 1. An apparatus for measuring oscillations of any kind, especially those of the bloodstream in sphygmometry.2. Any of various instruments used to measure physiological oscillations; specifically, in blood pressure.
an instrument for measuring oscillations, esp. those of the arterial pulse.