exogenesis

Etymology

From exo- + -genesis.

exogenesis means the theory that life on Earth is of extraterrestrial origin. Lexicurio rates it Sui generis — a strength score of 87 out of 100.

Why “exogenesis” is a great word

EXOGENESIS — [Noun] The theory that life, or its fundamental building blocks, originated from sources external to its current planetary environment. From the combining form exo- (from Greek ἔξω, meaning "outside") + -genesis (from Greek γένεσις, meaning "origin, creation"). First attested in the 1900s. Unlike abiogenesis, which details life's earthly emergence from inanimate matter, or endogenesis, which implies a strictly internal beginning, exogenesis posits a cosmic provenance. It is the bacterial spore preserved within a meteorite, the complex amino acid seeded from a comet's tail, and the silent drift of molecular blueprints across interstellar dust—a humbling theory that renders every living thing a permanent immigrant from a forgotten stellar home.

noun

The theory that life on Earth is of extraterrestrial origin.“Panspermia, one possible form of exogenesis, is the notion that the seeds of life are scattered throughout the universe.”
External origin.“In later development, the merozoites assume a peripheral location and grow outward at the surface, with the limiting membrane of the mother meront forming the outer membrane of the merozoite, as in exogenesis.”