botryoidalPronunciation: /ˌbɒtrɪˈɔɪd(ə)l/Definition of botryoidal adjective (chiefly of minerals) having a shape reminiscent of a cluster of grapes. Origin: late 18th century: from Greek botruoeidēs (from botrus 'bunch of grapes') + -albotryoidal in other Oxford dictionaries Definition of botryoidal in the US English dictionary
