- Any living individual, whether plant or animal, considered as a whole.- calculated mean o. (CMO) a hypothetical o. whose characters are the means of both the positive and negative characters of the organisms which belong to the same taxon as the CMO, as opposed to the hypothetical mean. o..- hypothetical mean o. (HMO) a hypothetical o. whose characters are the means of the positive characters of the organisms which belong to the same taxon as the HMO, as opposed to the calculated mean o..- pleuropneumonia-like organisms (PPLO) the original name given to a group of bacteria that did not possess cell walls; these organisms, isolated from humans and other animals, soil, and sewage, are now assigned to the order Mycoplasmatales.
* * *or·gan·ism 'ȯr-gə-.niz-əm n an individual constituted to carry on the activities of life by means of organs separate in function but mutually dependent: a living beingor·gan·is·mic .ȯr-gə-'niz-mik also or·gan·is·mal -məl adjor·gan·is·mi·cal·ly -mi-k(ə-)lē adv
* * *n.any living thing, which may consist of a single cell (see microorganism) or a group of differentiated but interdependent cells.
* * *or·gan·ism (orґgə-niz″əm) any individual living thing, whether animal or plant.
Medical dictionary. 2011.