En '''lamassu''' (flertal '''lumasi''') ([[Sumerisk]]: <sup>d</sup>lammař; [[Akkadisk (sprog)|akkadisk]]: ''lamassu''; nogle gange kaldet '''lamassus'''<ref>Kriwaczek, Paul. ''Babylon: Mesopotamia and the Birth of Civilization'', p. 37.</ref><ref>{{Cite web |url=http://www.torrossa.it/resources/an/2401509#page=241 |title=Arkiveret kopi |access-date=14. november 2017 |archive-date= 8. marts 2016 |archive-url=https://web.archive.org/web/20160308003132/http://torrossa.it/resources/an/2401509#page=241 |url-status=dead }}</ref>) er en [[Assyrien|assyrisk]] beskyttende guddom, der ofte er afbildet med et menneskehoved, en krop fra en [[Tamkvæg|tyr]] eller en [[løve]] og fuglevinger.<ref name="Livius.org">{{Cite web |url=http://www.livius.org/la-ld/lamassu/lamassu.html |title=Livius.org |access-date=14. november 2017 |archive-date= 9. februar 2010 |archive-url=https://web.archive.org/web/20100209184224/http://www.livius.org/la-ld/lamassu/lamassu.html |url-status=dead }}</ref> I nogle skriftlige kilder bliver den beskrevet som at repræsentere en kvindelig guddom.<ref>{{cite book |url=https://books.google.com/books?id=v-WRJhvfudIC&pg=PA137&dq=Lamassu&hl=en&ei=6xp-TOPRKMTIcc7I8NAJ&sa=X&oi=book_result&ct=result&resnum=2&ved=0CC8Q6AEwAQ#v=onepage&q=Lamassu&f=false |title=The Pantheon of Uruk during the Neo-Babylonian Period |first=Paul-Alain |last=Beaulieu|author-link=Paul-Alain Beaulieu |access-date=9. december 2010}}</ref><ref>{{cite web |url=http://psd.museum.upenn.edu |title=The Pennsylvania Sumerian Dictionary |access-date=9. december 2010}}</ref> Et mindre anvendt navn er '''shedu''', som referer til det mandlige modstykke til en lamassu.<ref>{{cite book |title=An Illustrated dictionary, Gods, Demons and Symbols of Ancient Mesopotamia |year=2003 |last=Black |first=Jeremy |author-link=Jeremy Black (assyriologist) |last2=Green |first2=Anthony |publisher=The British Museum Press |ISBN=0-7141-1705-6}}</ref> Lammasu eller lumasi repræsenterer [[dyrekreds]]e, forældrestjerner eller [[stjernebillede]].<ref name="ReferenceA">{{cite book|last1=Hewitt|first1=J.F.|title=History and Chronology of the Myth-Making Age|page=85}}</ref><ref name="ReferenceB">{{cite book|last1=W. King|first1=Leonard|title=Enuma Elish Vol 1 & 2: The Seven Tablets of Creation; The Babylonian and Assyrian Legends Concerning the Creation of the World and of Mankind|page=78}}</ref>
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