Unprecedented Scientists Film Atomic Motion Unlocking 2D Material Mysteries

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If something is unprecedented, it has never happened before. Something that is unprecedented is not known, experienced, or done before. She took the unprecedented step of revealing the truth about the situation. Such a move is rare, but not unprecedented. How to use unprecedented in a sentence. The meaning of unprecedented is having no precedent : Such an event was unprecedented in the 20th … Without previous instance; If youve never gone on a family beach … Never before known or experienced;