Definitions

1. noun

an optical instrument used to examine the interior of the eye or other small structures, or a reflective surface, typically a curved mirror, used to examine or manipulate an object, especially a metal instrument with a curved mirror used to examine the throat or an optical instrument used to examine the interior of a hollow object, especially the eye.

“The doctor used a speculum to examine the patient’s throat.”

2. noun

a mirror or reflecting surface.

“The artist used a speculum to reflect light onto the canvas.”