/ˈôrgəˌnizəm/
Noun, pl. organisms
1. An individual animal, plant, or single-celled life form. (wikipedia.com)
2. The material structure of such an individual. (wikipedia.com)
3. Any contiguous living system (such as animal, fungus, micro-organism, or plant). In at least some form, all types of organisms are capable of response to stimuli, reproduction, growth and development, and maintenance of homeostasis as a stable whole.(wikipedia.com)
4. A discrete and complete living thing, such as animal, plant, fungus or microorganism. (wiktionary.com)
Word origin: Greek ὀργανισμός – organismos, from Ancient Greek ὄργανον – organon (instrument, implement, tool, organ of sense or apprehension)