Plural of fulcrum; the pivot points or supports on which a lever turns, or metaphorically, key points on which something depends.
English plural of Latin 'fulcrum,' created by adding the standard '-s' suffix, making it one of the most commonly used forms of this Latin-derived word.
Fulcrums became so important to physics that 'fulcrum' is one of the few Latin technical terms that entered common English speech—almost everyone learns about them in science class, making it a rare success story of technical vocabulary.
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