Standard Lemma guide

exoatmosphere

noun · 2 senses · updated from the 2026-07-25 local source snapshot

Definitions and examples are grouped by meaning. Pronunciation, history, word forms, translations, descendants, synonyms, antonyms, derived terms, and related words appear whenever the source provides them.

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Pronunciation

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1

noun

Meaning 1

The region of space just outside the atmosphere proper; the outer atmosphere.

Definition source: English Wiktionary via Wiktextract

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

2

noun

Meaning 2

Abbreviation of exoplanetary atmosphere (“the atmosphere of an exoplanet”).

Definition source: English Wiktionary via Wiktextract

Usage: abbreviation, alt-of

Examples

  • 2016; E. Aronson, P. Waldén; "Using near-infrared spectroscopy for characterization of transiting exoplanets", Astronomy & Astrophysics, Volume 578, DOI 10.1051/0004-6361/201424058; BIBCODE 2015A&A...578A.133A; arXiv: 1504.05223; The feasibility of exoatmosphere detection by transit observations has been demonstrated by several authors.
  • 2015; Michael D. Lemonick, "The Dawn of Distant Skies", Exoplanets: Worlds Without End, Scientific American, pmid:23821863; →ISBN Marcy, Mayor and their colleagues had seen only the gravitational effect the planets had on their parent star; to detect a biosignature, you would need to image an exoatmosphere directly.
  • 2009; P. Rojo, J. Harrington, D. Deming, J. Fortney; "Transit Spectroscopy of the Extrasolar Planet HD 209458b", Bioastronomy 2007: Molecules, Microbes and Extraterrestrial Life ASP Conference Series, Vol. 420, Proceedings, Astronomical Society of the Pacific, BIBCODE 2009ASPC..420..321R This technique uses the fact that the area a transiting planet blocks from its host star varies with wavelength according to the unique spectral features of molecules in the exoatmosphere, allowing identification and abundance measurements from appropriately-timed observations

Meaning relationships

Synonyms: none provided

Antonyms: none provided

History

Etymology

From exo- + atmosphere.

Blend of exoplanet + atmosphere.