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2013-02-14 23:00:48

A UN treaty signed in January, 2013 mandates the phase-out of amalgam fillings worldwide due to health concerns, and Dr.


Word of the Day
pawl
  • A pivoted catch designed to fall into a notch on a ratchet wheel so as to allow movement in only one direction (e.g. on a windlass or in a clock mechanism), or alternatively to move the wheel in one direction.
The word 'pawl' probably comes from a Latin word meaning 'stake'.
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