commorientes

from Bouvier's Law Dictionary, Revised 6th Ed (1856)
COMMORIENTES. This Latin word signifies those who die at the same time, as, 
for example, by shipwreck. 
     2. When several persons die by the same accident, and there is no 
evidence as to who survived, the presumption of law is, they all died at the 
same time. 2 Phillim. R. 261 Fearne on Rem. iv.; 5 B. & Adol. 91; Cro. Eliz. 
503; Bac. Ab. Execution, D; 1 Mer. R. 308. See Death; Survivor. 
    

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