Ancestor X

proper noun

The hypothetical ancestral species that is the most recent and last common ancestor of Homo sapiens, Homo neanderthalensis — the Neanderthals, Homo longi (“Dragon Man”) — the Denisovans.

Ask AI about this wordChatGPTClaudePerplexityGoogle AIGrok

Meanings

proper noun
  1. anthropologyThe hypothetical ancestral species that is the most recent and last common ancestor of Homo sapiens, Homo neanderthalensis — the Neanderthals, Homo longi (“Dragon Man”) — the Denisovans.

Origin

ancestor + X (“unknown”)

Full word history & related roots →
Cite this entry
APA

Ancestor X. (n.d.). In WatkinsX Dictionary. Retrieved November 4, 2026, from https://dictionary.watkinsx.com/word/Ancestor%20X

MLA

“Ancestor X.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/Ancestor%20X. Accessed November 4, 2026.

Chicago

WatkinsX Dictionary, s.v. “Ancestor X,” accessed November 4, 2026, https://dictionary.watkinsx.com/word/Ancestor%20X.

Source: Ancestor X on Wiktionary, CC BY-SA 4.0.