Lifeblood Definition
līfblŭd
noun
The blood necessary to life.
Webster's New World
A vital element or animating influence.
Webster's New World
(figuratively) That which is required for continued existence or function.
Gasoline is the lifeblood of the modern city.
Wiktionary
Other Word Forms of Lifeblood
Noun
Singular:
lifeblood
Plural:
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