ˈklavəˌlād.ə̇d adjective
Etymology: Medieval Latin clavellat us (from clavellus nail — from Late Latin, small sore resembling the head of a nail, diminutive of Latin clavus nail — + Latin -atus -ate) + English -ed — probably from the nail-studded appearance of the surface of clavellated ashes — more at clavus
old chemistry : made of the dried and burned lees or dregs of wine or vegetable matter
clavellated ashes