Having the shape of a crater; bowl-shaped or funnel-shaped with steep or sloping sides.
From crater + -form (Latin forma meaning 'form' or 'shape'). This combining form is used in anatomy, geology, and botany to describe things shaped like other things.
Many plants develop crateriform flowers with the pistil sunk in the center—this design actually helps protect the flower's reproductive parts while making them accessible to the right pollinators.
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