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Definition of xenobiology

xenobiology

/ˌziːnoʊbaɪˈɑːlədʒi/
xe · no · bi · ol · o · gy
Adverb:xenobiologically
•
Adjective:xenobiological
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xenobiology Lexical Profile

xenobiology Game Scores & Validity

• noun

1

The branch of biology concerned with the study or theoretical speculation of extraterrestrial life forms and potential alien biospheres.

Example

"The detection of mysterious atmospheric gases on the distant exoplanet triggered a surge of interest among experts in xenobiology."

2

A subfield of synthetic biology that focuses on designing and constructing biological systems using non-natural or non-standard biochemicals, such as synthetic DNA or unnatural amino acids.

Example

"Researchers in xenobiology are working to engineer bacteria that rely on genetic codes entirely different from those found in nature."

Synonyms
View all synonyms for xenobiology

Word Nuance & Usage

While often used interchangeably with astrobiology or exobiology, xenobiology specifically emphasizes biological systems based on non-standard, alien, or entirely synthetic biochemistry.

• Rhymes for xenobiology

• Nearby Words

xenium
xennial
xenobiologist
xenobiology
xenoblast
xenodochium
xenogenesis

Word Origin & Etymology

Coined in the 1950s (popularized by science fiction author Robert A. Heinlein) from the Greek 'xeno-' (foreign, strange), 'bio-' (life), and the suffix '-logy' (study of).

Usage Trend

Historical frequency of usage in published text.

180019102020
Data source: Google Books Ngram Viewer

Cite this Entry

Wordmom. (2026). Definition of Xenobiology. In Wordmom Dictionary. Retrieved Nov 5, 2026, from https://wordmom.com/dictionary/xenobiology
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