noun
The word 'lifecycle' is a noun that refers to the series of stages through which a living organism passes from the beginning of its life until its death.
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The software development team created a detailed plan outlining the entire lifecycle of the project.
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I just learned about the lifecycle of a butterfly in science class.
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Dude, I'm just trying to figure out the whole 'adulting' lifecycle.
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The lifecycle of a relationship can be full of ups and downs.