William Rankine
{{Infobox scientist|name=William John Macquorn Rankine|honorific_suffix={{Post-nominals|country=GBR|FRSE|FRS|size=100%}}|image=William John Macquorn Rankine by Thomas Annan.jpg|image_size=|caption=William John Macquorn Rankine|birth_date={{birth date|1820|7|5|df=y}}|birth_place=[[Edinburgh]], Scotland|death_date={{death date and age|1872|12|24|1820|7|5|df=y}}|death_place=[[Glasgow]], Scotland|nationality=Scottish|field=[[Physics]], [[engineering]], [[civil engineering]]|workplaces=[[University of Glasgow]]|alma_mater=[[University of Edinburgh]]|doctoral_advisor=|doctoral_students=|known_for={{plainlist|
*[[Rankine body]]
*[[Rankine half body]]
*[[Rankine cycle]]
*[[Rankine's method]]
*[[Rankine scale]]
*[[Rankine theory]]
*[[Rankine vortex]]
*[[Rankine–Hugoniot relation]]
*[[Laws of thermodynamics]]
*[[Second law of thermodynamics]]
*[[Entropy]]
*[[Heat death of the universe]]
*[[Heat death paradox|Kelvin’s heat death paradox]] 
*[[Potential energy|Coining the term 'potential energy']]}}|author_abbrev_bot=|author_abbrev_zoo=|influences=|influenced=[[Pierre Duhem]]|prizes=[[Keith Medal]] <small>(1854)</small>|religion=|footnotes=|signature=<!-- included in portrait -->}}
Si '''William John Macquorn Rankine''' {{Post-nominals|FRSE|FRS|country=GBR}} ({{IPAc-en|ˈ|r|æ|ŋ|k|ɪ|n}}; Hulyo 5, 1820 – Desyembre 24 1872) iyo an Scottish mechanical engineer na nagkontribwir man sa [[civil engineering]], physics asin mathematics. Siya an kagmukna na nagkontribwir kaiba si [[Rudolf Clausius]] asin [[William Thomson, 1st Baron Kelvin|William Thomson]] (Lord Kelvin), sa siyensya kan [[thermodynamics]], urog na sa pagpokus sa saiyang Enot na Ley. Pina-urog niya an [[Rankine|Rankine scale]], sarong nakabase sa Fahrenheit na katumbas kan nakabase sa Celsius na [[Kelvin|Kelvin scale]] kan temperatura.

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Si William John Macquorn Rankine  (; Hulyo 5, 1820 – Desyembre 24 1872) iyo an Scottish mechanical engineer na nagkontribwir man sa civil engineering, physics asin mathematics. Siya an kagmukna na nagkontribwir kaiba si Rudolf Clausius asin William Thomson (Lord Kelvin), sa siyensya kan thermodynamics, urog na sa pagpokus sa saiyang Enot na Ley. Pina-urog niya an Rankine scale, sarong nakabase sa Fahrenheit na katumbas kan nakabase sa Celsius na Kelvin scale kan temperatura.