Dead are also used for the non living matter, it works either way.
a living that becomes dead by lacking life or it's original dead because it lacks life.
This definition presupposed that air, a medium composed of ten
chemical species:
nitrogen (N2) 78%, oxygen (O2) 21%, as well as argon (Ar), neon (Ne), helium (He), methane (CH4), krypton (Kr), hydrogen (H2), nitrous oxide (N2O), and xenon (Xe), in smaller percentages, is an example of ‘
dead matter’, but that these ten atoms and molecules become living matter or, in other words, ‘alive’ when inhaled, which is a nonsensical postulate.
Non-living matter - Hmolpedia