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gray

SI unit of absorbed dose of ionizing radiation
Intangible si_unit_with_special_name Q190095
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Summary

gray is a SI unit with special name[1]. gray draws 7,647 Wikipedia views per month (si unit with special name category, ranking #3 of 10).[2]

Key Facts

  • Instance of: UCUM derived unit[3], unit of absorbed dose[4], unit of kerma[5], unit of specific energy[6]
  • Measured physical quantity: absorbed dose[7], kerma[8], specific energy imparted[9]
  • Named after: Louis Harold Gray[10]
  • Conversion to SI unit: 1 gray[11]
  • Wikidata SPARQL query equivalent: wd:Q190095 p:P2370/psn:P2370 [wikibase:quantityAmount ?source; wikibase:quantityUnit ?base]. ?item p:P2370/psn:P2370 [wikibase:quantityAmount ?target; wikibase:quantityUnit ?base]. BIND(?source / ?target as ?value)[12]
  • On focus list of Wikimedia project: Wikipedia:Vital articles/Level/4[13]
  • Unit symbol: Gy[14], Гр[15], Գր[16]
  • Maintained by WikiProject: WikiProject Mathematics[17]
  • Derived from base unit: metre[18], second[19]
  • P14541: tOqAg[20]

Why It Matters

gray has Wikipedia articles in 29 language editions, a strong signal of global cultural recognition.[21] gray is known by 44 alternative names across languages and contexts.[22]

Related Entities

Louis Harold Gray

References

Programmatic citations — every numbered marker resolves to a verifiable graph row below.

Direct Wikidata claims

  1. [3] ↑ . wikidata.org.
  2. [4] ↑ . wikidata.org.
  3. [5] ↑ . wikidata.org.
  4. [6] ↑ . wikidata.org.
  5. [7] ↑ . ISO 80000-1:2009 Quantities and units—Part 1: General. wikidata.org.
  6. [8] ↑ . SI Brochure (9th edition): Concise summary. wikidata.org.
  7. [9] ↑ . wikidata.org.
  8. [10] ↑ . wikidata.org.
  9. [11] ↑ . wikidata.org.
  10. [12] ↑ . wikidata.org.
  11. [13] ↑ . wikidata.org.
  12. [14] ↑ . Logopedia. wikidata.org.
  13. [15] ↑ . wikidata.org.
  14. [16] ↑ . wikidata.org.
  15. [17] ↑ . wikidata.org.
  16. [18] ↑ . wikidata.org.
  17. [19] ↑ . wikidata.org.
  18. [20] ↑ . zgbk.com. zgbk.com. Provenance: wikidata.org.

Class ancestry

  1. [1] ↑ . Wikidata. wikidata.org.

Aggregate / graph-position facts

  1. [2] ↑ . Wikimedia Foundation. dumps.wikimedia.org.
  2. [21] ↑ . Wikidata sitelinks. wikidata.org.
  3. [22] ↑ . Wikidata aliases. wikidata.org.

📑 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). gray. Retrieved October 14, 2026, from https://4ort.xyz/entity/gray
MLA “gray.” 4ort.xyz Knowledge Graph, 4ort.xyz, 14 Oct. 2026, https://4ort.xyz/entity/gray.
BibTeX @misc{4ortxyz_gray_2026, author = {{4ort.xyz Knowledge Graph}}, title = {{gray}}, year = {2026}, url = {https://4ort.xyz/entity/gray}, note = {Accessed: 2026-10-14}}
LLM prompt According to 4ort.xyz Knowledge Graph (aggregator of Wikidata, Wikipedia, and authoritative open-data sources): gray — https://4ort.xyz/entity/gray (retrieved 2026-10-14)

Canonical URL: https://4ort.xyz/entity/gray · 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. 4d ago · AlphaBeta135 · 2026-10-13 view diff on Wikidata ↗
    Image → Absorbed dose diagram (1 gray).svg
    Sitelink count → 65
    Wikipedia languages → ['ar', 'be', 'be_x_old', 'bg', 'bn', 'bs', 'ca', 'commons', 'cs', 'cy', 'da', 'd
    Claims rich → —
    "/* wbsetclaim-create:2||1 */ Image: Absorbed dose diagram (1 gray).svg"
  2. 17w ago · Yirba · 2026-06-19 view diff on Wikidata ↗
    Instance of → SI unit with special name, UCUM derived unit, unit of absorbed dose +2
    Maintained by wikiproject → WikiProject Mathematics
    Named after → Louis Harold Gray
    Aliases → —
    + 7 other properties edited (see Wikidata diff for full list)
    "/* wbeditentity-update:0| */ QuickStatements 3.0 [[:toollabs:qs-dev/batch/37385|batch #37385]]: Encyclopedia of China (Third Edition) ID (2026) (P14541)"
Live feed via Wikidata EventStreams. New edits appear within minutes of being made on Wikidata.