speculum

Definitions

Astronomy

  • Latin for mirror. Speculum metal was the raw material of astronomical telescope mirrors from the time of Newton until the 19th century, and was an alloy of copper, tin and other materials according to various formulae.

Medical

  • noun a surgical instrument which is inserted into an opening in the body such as a nostril or the vagina to keep it open in order to allow a doctor to examine the inside
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