or·gan·ism 
(ôrgə-nĭz′əm)
(ôrgə-nĭz′əm)n.
1. An individual form of life, such as a bacterium, protist, fungus, plant, or animal, composed of a single cell or a complex of cells in which organelles or organs work together to carry out the various processes of life.
2. A system regarded as analogous in its structure or functions to a living body: the social organism.
or′gan·ismal (-nĭzməl), or′gan·ismic (-mĭk) adj.
or′gan·ismi·cal·ly adv.