(countable, uncountable) Any fungus in the genus Claviceps which are parasitic on grasses.
(countable, uncountable) The sclerotium (wintering stage) of certain fungi in the genus Claviceps, appearing as a deformed grain in certain cereals and grasses infected by the fungi.
(countable, uncountable) The wart-like growth of skin that covers the metacarpal pad on a horse or similar animal.