bipyramid /bī-pirˈə-mid/

A crystal form of two pyramids base to base

• gradatim
• gradating
• gradation
• gradational
• gradationally
• gradationed
• gradations
• gradatory
• graddan
• graddaned
• graddaning
• graddans
• grade
• grade crossing
• grade crossings
• graded
• graded-index fibre
• graded post
• graded posts
• gradely
• grader
• graders
• grades
• grade school
• grade schools