chalkstone

/ˈtʃɔkˌstoʊn/
noun
  1. A small piece of chalk, especially one used for writing or drawing.
    • Children used colorful chalkstones to draw hopscotch squares on the sidewalk.
    • She found a chalkstone in her pocket and sketched a quick flower on the pavement.
    • The teacher picked up a chalkstone and wrote the math problem on the board.
  2. A hard, chalky deposit that forms in the joints of people with gout, also called a tophus.
    • Without treatment, chalkstones can develop in the fingers and elbows of gout patients.
    • He had surgery to remove a chalkstone from his knee joint.
    • The doctor explained that the painful lump on his toe was a chalkstone caused by gout.
Synonyms
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