Nutrition
From Tardis Wiki, the free Doctor Who reference
Requiring nutrition was one of the seven characteristics of life. (AUDIO: A Handful of Dust)
Historians who had been allowed access to the "Monster Vaults" of the databanks in the Doctor's TARDIS observed the Abzorbaloffs' absorbed their victims not just for nutrition but to assimilate their minds. (PROSE: The Monster Vault)
