absolute zero
US /ˌæb.sə.luːt ˈzɪr.oʊ/
UK /ˌæb.sə.luːt ˈzɪr.oʊ/

1.
zero absoluto
the lowest possible temperature, at which point atoms and molecules have the minimum possible energy, equal to −273.15°C or −459.67°F.
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Scientists are trying to achieve temperatures close to absolute zero in their experiments.
Cientistas estão tentando atingir temperaturas próximas ao zero absoluto em seus experimentos.
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At absolute zero, all atomic motion theoretically ceases.
No zero absoluto, todo movimento atômico cessa teoricamente.