a person from whom one is descended; forebear; progenitor.
Biology. the actual or hypothetical form or stock from which an organism has developed or descended.
an object, idea, style, or occurrence serving as a prototype, forerunner, or inspiration to a later one: The balloon is an ancestor of the modern dirigible.
a person who serves as an influence or model for another; one from whom mental, artistic, spiritual, etc., descent is claimed: a philosophical ancestor.
Law. a person from whom an heir derives an inheritance.
Origin of ancestor
1250–1300; Middle English ancestre<Old French (with t developed between s and r) <Latin antecessorantecessor
An analysis of molecular alterations in mitochondrial DNA samples indicated that two maternal lineages had split from a common ancestor between about 86,000 and 22,000 years ago.
Climate change, not hunters, may have killed off woolly rhinos|Bruce Bower|August 13, 2020|Science News
Eventually alien biologists in these places might concern themselves with a tree of life incorporating multiple planetary incubators, and their genome-mapping companies would tell you who your planetary ancestors were.
How Life Could Continue to Evolve - Issue 88: Love & Sex|Caleb Scharf|August 12, 2020|Nautilus
None of the matings in any of the generations are between individuals with a common ancestor.
How to Design (or at Least Model) Mixed Dog Breeds|Pradeep Mutalik|July 31, 2020|Quanta Magazine
While BigDog is the ancestor of later four-legged robots, like Spot, Petman preceded the two-legged Atlas robot.
The Robot Revolution Was Televised: Our All-Time Favorite Boston Dynamics Robot Videos|Jason Dorrier|July 19, 2020|Singularity Hub
Proof that the handedness of particles really can mutate microbes would strengthen their case that cosmic rays shoved our ancestors off the evolutionary starting block, but it still wouldn’t fully explain the uniform chirality of life on Earth.
Cosmic Rays May Explain Life’s Bias for Right-Handed DNA|Charlie Wood|June 29, 2020|Quanta Magazine
It is possible to name an ancestor to this obsessive-compulsive noir: David Lynch.