noun which may take the genitive case particle 'no'
cone-shaped; conical
Describes something shaped like a suribachi (Japanese grinding mortar), i.e., a wide, shallow cone. Often used in technical or descriptive contexts.
この火山は擂鉢形の火口を持っている。
This volcano has a cone-shaped crater.
擂鉢形の容器に材料を入れて混ぜる。
Put the ingredients into a conical container and mix.
円錐形 is a more general term for a geometric cone, while 擂鉢形 specifically evokes the shape of a Japanese mortar, which is typically wider and shallower.
Compound of 擂鉢 (suribachi, 'Japanese grinding mortar') and 形 (kata/gata, 'shape'). The word describes the distinctive wide, shallow conical shape of a suribachi.