living fossil

American  

noun

1. an organism that is a living example of an otherwise extinct group and that has remained virtually unchanged in structure and function over a long period of time, as the coelacanth and the horseshoe crab.

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living fossil British  

noun

1. an animal or plant, such as the coelacanth and ginkgo, belonging to a group most of whose members are extinct

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Etymology

Origin of living fossil

First recorded in 1920–25

Example Sentences

See Examples For:

living fossil

A living fossil is a term for a species that was once known only from its fossil record and was later discovered in living form, apparently preserving the physical features from long-gone ancestors.

From Los Angeles Times ● Sep. 16, 2025

The Ginkgo Biloba in Leiden, Netherlands, is a 240 year-old "living fossil" and the second oldest in Europe.

From BBC ● Mar. 19, 2025

A living fossil had been found, and botanists were excited.

From Seattle Times ● May 24, 2024

"It's like finding a living fossil at the genetic level."

From Science Daily ● Jan. 18, 2024

Australia has also one still more ancient denizen than any of these, a living fossil of the very oldest sort, a creature of wholly immemorial and primitive antiquity.

From Falling in Love With Other Essays on More Exact Branches of Science by Allen, Grant