Sclerotium \Scle*ro"ti*um\, n.; pl. Sclerotia. [NL., fr. Gr. sklhro`s hard.]

1. (Bot.) A hardened body formed by certain fungi, as by the Claviceps purpurea, which produces ergot.

2. (Zo["o]l.) The mature or resting stage of a plasmodium.

Source: Webster's Revised Unabridged Dictionary (1913)