单词 | fulcrum |
释义 | ful·crum ![]() n. pl. ful·crums or ful·cra (-krə) 1. The point or support on which a lever pivots. 2. Zoology An anatomical structure that acts as a hinge or a point of support. 3. An agent through which vital powers are exercised. [Latin, bedpost, from fulcīre, to support.] ![]() relative position of the fulcrum in three basic types of levers, with arrows indicating the direction of the effort and the downward force of the load |
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