Organism

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Dictionary Meaning and Definition on 'Organism'

Organism Meaning and Definition from WordNet (r) 2.0
    organism n
  1. a living thing that has (or can develop) the ability to act or function independently [syn: being]
  2. a system considered analogous in structure or function to a living body; "the social organism"
Organism Meaning and Definition from Webster's Revised Unabridged Dictionary (1913)
    Organism \Or"gan*ism\, n. [Cf. F. organisme.]
  1. Organic structure; organization. ``The advantageous organism of the eye.'' --Grew.
  2. (Biol.) An organized being; a living body, either vegetable or animal, compozed of different organs or parts with functions which are separate, but mutually dependent, and essential to the life of the individual. Note: Some of the lower forms of life are so simple in structure as to be without organs, but are still called organisms, since they have different parts analogous in functions to the organs of higher plants and animals.
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Wikipedia Meaning and Definition on 'Organism'


In biology, an organism is any contiguous living system (such as animal, plant, fungus, or micro-organism). In at least some form, all organisms are capable of response to stimuli, reproduction, growth and development, and maintenance of homoeostasis as a stable whole. An organism may either be unicellular (single-celled) or be composed of, as in humans, many trillions of cells grouped into specialized tissues and organs. The term multicellular (many-celled) describes any organism made up of more than one cell.

The term "organism" (Greek ὀργανισμός – organismos, from Ancient Greek ὄργανον – organon "organ, instrument, tool") first appeared in the English language in 1701 and took on its current definition by 1834 (Oxford English Dictionary).

Scientific classification in biology considers organisms synonymous with "life on Earth". Based on cell type, organisms may be divided into the prokaryotic and eukaryotic groups. The prokaryotes represent two separate domains, the Bacteria and Archaea. Eukaryotic organisms, with a membrane-bounded cell nucleus, also contain organelles, namely mitochondria and (in plants) plastids, generally considered to be derived from endosymbiotic bacteria. Fungi, animals and plants are examples of species that are eukaryotes.

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'Organism' in famous quotation sentence


* It is an error to imagine that evolution signifies a constant tendency to increased perfection. That process undoubtedly involves a constant remodelling of the organism in adaptation to new conditions but it depends on the nature of those conditions whether the directions of the modifications effected shall be upward or downward. - Thomas Huxley

* Jean Grey Mutation. It is the key to our evolution. It has enabled us to evolve from a single-celled organism into the dominant species on the planet. This process is slow and normally taking thousands and thousands of years. But every few hundred millennia, evolution leaps forward. - X2 X-Men United

* All progress is based upon a universal innate desire on the part of every organism to live beyond its income. - Samuel Butler


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Organism Sample Sentences in News


  • This Bizarre Organism Builds Itself a New Genome Every Time It Has Sex
    Oxytricha trifallax lives in ponds all over the world. Under an electron microscope it looks like a football adorned with tassels. The tiny fringes are the cilia it uses to move around and gobble up algae. What makes Oxytricha unusual, however, is the crazy things it does with its DNA. Unlike humans and most other […] The post This Bizarre Organism Builds Itself Read more on this news related to 'Organism'
  • Louisiana residents warned of brain-eating organism in water supply
    Water warning culprit is Naegleria fowleri, a type of warm-water-loving microorganism, which can work its way into the brain For the third time in a year, Louisiana residents are being cautioned to watch out for a deadly, brain-eating amoeba-like organism in the water supply in part of the state. Residents in four towns in St John the Baptist Parish about 12,500 p Read more on this news related to 'Organism'
  • Parkbench: The Business of Hyperlocal Business
    Humans are complex multicellular organisms with an ancestral history dating back over three billion years – connecting us to our fore fathers the single-celled organism. The coloni Read more on this news related to 'Organism'

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