The process of growth or development that occurs from within an organism or structure, rather than from external influences.
From Greek endo- (within) + genesis (creation, origin). This scientific term emerged in the 19th century to describe biological and geological processes that develop from internal forces rather than outside factors.
Geologists use this word to explain how mountains can grow from forces within the Earth itself—like the planet is building itself from the inside out, which is pretty mind-blowing when you think about it!
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