You know what it looks like… but what is it called?
TAKE THE QUIZrule joint
noun
: a knuckle joint having shoulders that abut when the connected pieces are opened out fully and thus permit folding in one direction only
Love words? Need even more definitions?
Merriam-Webster unabridged
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- The business’s new computer system proved not to be a panacea.


Can you make 12 words with 7 letters?
PLAY
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