organism

1. (biology) A discrete and complete living thing, such as animal, plant, fungus or microorganism.Examples: "Plastics are energy-rich substances, which is why many of them burn so readily. Any organism that could unlock and use that energy would do well in the Anthropocene. Terrestrial bacteria and fungi which can manage this trick are already familiar to experts in the field."; "This strategy, known as caloric restriction, has been shown to increase the life span of various organisms and reduce their rate of cancer and other age-related ailments."

2. (obsolete, rare) The fact of being organic; organicity.obsoleterare