Definition of platelet in US English:

platelet

noun

Physiology
  • A small colorless disk-shaped cell fragment without a nucleus, found in large numbers in blood and involved in clotting.

    Also called thrombocyte
    • ‘Aspirin prevents heart disease by keeping the platelets in our blood from sticking together and forming a clot.’
    • ‘The bone marrow is responsible for formation of blood components such as the white blood cells and platelets.’
    • ‘After five or six days in hospital Kim was diagnosed with severe aplastic anaemia which is a failure of the bone marrow to produce blood cells and platelets.’
    • ‘The animals also showed no significant decreases in white blood cells or platelets.’
    • ‘For example, a person can receive only platelets, red blood cells, or a clotting factor.’

Pronunciation

platelet

/ˈpleɪtlɪt//ˈplātlit/