[foo l-kruh m, fuhl-]
- the support, or point of rest, on which a lever turns in moving a body.
- any prop or support.
- Zoology. any of various structures in an animal serving as a hinge or support.
- to fit with a fulcrum; put a fulcrum on.
Origin of fulcrum
1665–75; < Latin: back-support of a couch, apparently for fulctrum, equivalent to fulc(īre) to hold up, support + -trum noun suffix of instrument
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for fulcra
The fins often, as in Polypterus, have spines (fulcra) attached to their anterior borders.The Vertebrate Skeleton
Sidney H. Reynolds
Their position outside the fulcra shows that this explanation is impossible.The Appendages, Anatomy, and Relationships of Trilobites
Percy Edward Raymond
- the pivot about which a lever turns
- something that supports or sustains; prop
- a spinelike scale occurring in rows along the anterior edge of the fins in primitive bony fishes such as the sturgeon
C17: from Latin: foot of a couch, bedpost, from fulcire to prop up
Word Origin and History for fulcra
1670s, "a prop, a support" (on which a lever turns), from Latin fulcrum "bedpost," from fulcire "to prop up, support" (see balk).
Online Etymology Dictionary, © 2010 Douglas Harper
- The point or support on which a lever pivots.
- An anatomical structure that acts as a hinge or point of support.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
- The point or support on which a lever turns. The position of the fulcrum, relative to the positions of the load and effort, determines the type of lever.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
The point on which a lever is balanced when a force is exerted.
The New Dictionary of Cultural Literacy, Third Edition Copyright © 2005 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.