from The American Heritage® Dictionary of the English Language, 4th Edition

  • n. Blood regarded as essential for life.
  • n. An indispensable or vital part: Capable workers are the lifeblood of the business.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. Blood which is needed for continued life; blood regarded as the seat of life.
  • n. That which is required for continued existence or function.

from the GNU version of the Collaborative International Dictionary of English

  • n. The blood necessary to life; vital blood.
  • n. Fig.: That which gives strength and energy.

from The Century Dictionary and Cyclopedia

  • n. The blood necessary to life; vital blood.
  • n. That which is essential to the existence or strength of something; that which constitutes or gives strength and energy. Also life's-blood, or, preferably, life's blood.
  • n. In pathology, the more or less constant spasmodic quivering of the eyelid or lip: also called life's-blood, live-blood, and cillo.
  • Necessary as blood to life; essential.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • n. the blood considered as the seat of vitality
  • n. an essential or life-giving force


Sorry, no etymologies found.



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