bot·ry·oi·dal \| ̷ ̷ ̷ ̷|ȯidəl\adjective alsobot·ry·oid\ˈ ̷ ̷ ̷ ̷ˌȯid\ Etymology:botryoidal from botryoid, adjective + -al; botryoid from Greek botryoeidēs, from botry- + -oeidēs -oid : having the form of a bunch of grapes < a botryoidal mineral structure > < botryoidal growths >