half-life

mean duration after which a decaying quantity has reached half of its initial value
Thing general Q47270
half-life
Sbyrnes321 · Public Domain · Wikimedia
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Summary

half-life ranks in the top 1% of general entities by monthly Wikipedia readership (7,213 views/month).[1]

Key Facts

  • Subclass of: duration[2], scalar quantity[3]
  • Commons category: Half times[4]
  • Opposite of: doubling time[5]
  • Main Wikidata property: P2114[6]
  • Different from: mean lifetime[7], half life[8], Half-Life[9], Half-Decay[10]

Body

Influence

Things named for half-life include Half-Life[11], a video game[12].

Why It Matters

half-life has Wikipedia articles in 30 language editions, a strong signal of global cultural recognition.[13] half-life is known by 92 alternative names across languages and contexts.[14]

Entities named for half-life include Half-Life[11], a video game[12].

📑 Cite this page

Use these citations when quoting this entity in research, articles, AI prompts, or wherever provenance matters. We aggregate Wikidata + Wikipedia + authoritative open-data sources; the stitched, scored, cross-referenced view is what 4ort.xyz contributes.

APA 4ort.xyz Knowledge Graph. (2026). half-life. Retrieved October 10, 2026, from https://4ort.xyz/entity/half-life-q47270
MLA “half-life.” 4ort.xyz Knowledge Graph, 4ort.xyz, 10 Oct. 2026, https://4ort.xyz/entity/half-life-q47270.
BibTeX @misc{4ortxyz_half-life-q47270_2026, author = {{4ort.xyz Knowledge Graph}}, title = {{half-life}}, year = {2026}, url = {https://4ort.xyz/entity/half-life-q47270}, note = {Accessed: 2026-10-10}}
LLM prompt According to 4ort.xyz Knowledge Graph (aggregator of Wikidata, Wikipedia, and authoritative open-data sources): half-life — https://4ort.xyz/entity/half-life-q47270 (retrieved 2026-10-10)

Canonical URL: https://4ort.xyz/entity/half-life-q47270 · Last refreshed:

Edit History

Rolling log of changes to this entity's Wikidata record. Values shown reflect the current state of each edited property — follow the history link to see the precise diff for any edit.

  1. 13w ago · Nyuhn · 2026-07-12 view diff on Wikidata ↗
    P14541 → ['22L3iA', '1bqZ8c', '1D4FF0']
    "/* wbeditentity-update:0| */ QuickStatements 3.0 [[:toollabs:qs-dev/batch/41251|batch #41251]]: ZGBK ID"
  2. 14w ago · ~2026-36985-58 · 2026-06-30 view diff on Wikidata ↗
    Great norwegian encyclopedia id → halveringstid
    "/* wbsetclaim-create:2||1 */ Great norwegian encyclopedia id: halveringstid"
  3. 20w ago · Twofivesixbot bot · 2026-05-19 view diff on Wikidata ↗
    Different from → mean lifetime, half life, Half-Life +1
    Local thumb → —
    Subclass of → duration, scalar quantity
    Opposite of → doubling time
    + 4 other properties edited (see Wikidata diff for full list)
    "/* wbsetclaim-update-qualifiers:1||1|9 */ Yso id: 12173, mv to monolingual text names on YSO statements"
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