"Diedral" is a word in ENGLISH

diedral ENGLISH
Definition:

The same as Dihedral.

Few words of positivity

A person with a new idea is a crank until the idea succeeds.

Mark Twain

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Laugh your heart out.

Q: What do you call it when a cat bites? - A: Catnip!

dihedral ENGLISH

Having two plane faces; as, the dihedral summit of a crystal.

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