dihedral /dī-hēˈdrəl/, sometimes diedral /dī-ēˈdrəl/ (mathematics, etc)

Bounded by two planes, or two plane faces

A dihedral angle

dihēˈdron noun

The limiting case of a double pyramid when the vertices coincide

dihedral angle noun

The angle made by the wing of an aeroplane with the horizontal axis

• diethylamine
• diethylamines
• diethyl ether
• diethyl ethers
• diethylstilbestrol
• diethylstilboestrol
• dietician
• dieticians
• dietine
• dieting
• dietist
• dietitian
• dietitians
• diets
• diet sheet
• diet sheets
• Dieu
• Dieu avec nous
• Dieu défend le droit
• Dieu et mon droit
• dead-heated
• dead-heating
• dead heats
• dead-heats
• deadhouse