bipyramid /bī-pirˈə-mid/

A crystal form of two pyramids base to base

• winterbournes
• winter bud
• winter buds
• winter cherries
• winter cherry
• winter-clad
• winter clover
• winter clovers
• winter cress
• winter cresses
• wintered
• winterer
• winterers
• winter garden
• winter gardens
• wintergreen
• wintergreens
• winter-ground
• winter-grounded
• winter-grounding
• winter-grounds
• winter heliotrope
• winter heliotropes
• winterier
• winteriest