platelet
nounUK /ˈpleɪtlət/
US /ˈpleɪtlət/
A tiny piece in your blood that helps stop bleeding.
When you get a small cut, platelets rush to the spot and help the blood clot.
RELATED WORDS
OTHER MEANINGS
2. A small flat disc or plate-like structure.
The microscope slide showed tiny platelets of mineral on the surface.
3. A small flat particle in a photographic emulsion.
The old film contained silver platelets that reacted to light.
4. A tiny flat cell fragment in the blood of mammals.
Doctors checked her platelet count after the illness.