speculum
/ˈspɛkjələm/
noun
- A medical instrument used to open a body cavity or passage so that a doctor can examine the inside.
- The nurse cleaned the speculum after the procedure.
- During the checkup, the gynecologist inserted a speculum to view the cervix.
- The doctor used a speculum to examine the patient's ear canal.
- A bright, shiny, often metallic patch of color on the wings of some birds, especially ducks.
- The mallard's speculum is a brilliant blue-green patch on its wing.
- The iridescent speculum of the teal shimmered in the sunlight.
- Birdwatchers can identify many duck species by the color of their speculum.