| organism | | |
| n. (tops) | 1. being, organism | a living thing that has (or can develop) the ability to act or function independently. |
| ~ animate thing, living thing | a living (or once living) entity. |
| ~ benthos | organisms (plants and animals) that live at or near the bottom of a sea. |
| ~ dwarf | a plant or animal that is atypically small. |
| ~ heterotroph | an organism that depends on complex organic substances for nutrition. |
| ~ parent | an organism (plant or animal) from which younger ones are obtained. |
| ~ cell | (biology) the basic structural and functional unit of all organisms; they may exist as independent units of life (as in monads) or may form colonies or tissues as in higher plants and animals. |
| ~ individual, mortal, person, somebody, someone, soul | a human being.; "there was too much for one person to do" |
| ~ animal, animate being, beast, creature, brute, fauna | a living organism characterized by voluntary movement. |
| ~ plant life, flora, plant | (botany) a living organism lacking the power of locomotion. |
| ~ native | indigenous plants and animals. |
| ~ recombinant | a cell or organism in which genetic recombination has occurred. |
| ~ conspecific | an organism belonging to the same species as another organism. |
| ~ carrier | (genetics) an organism that possesses a recessive gene whose effect is masked by a dominant allele; the associated trait is not apparent but can be passed on to offspring. |
| ~ denizen | a plant or animal naturalized in a region.; "denizens of field and forest"; "denizens of the deep" |
| ~ amphidiploid | (genetics) an organism or cell having a diploid set of chromosomes from each parent. |
| ~ diploid | (genetics) an organism or cell having the normal amount of DNA per cell; i.e., two sets of chromosomes or twice the haploid number. |
| ~ haploid | (genetics) an organism or cell having only one complete set of chromosomes. |
| ~ heteroploid | (genetics) an organism or cell having a chromosome number that is not an even multiple of the haploid chromosome number for that species. |
| ~ polyploid | (genetics) an organism or cell having more than twice the haploid number of chromosomes. |
| ~ animalcule, animalculum | microscopic organism such as an amoeba or paramecium. |
| ~ micro-organism, microorganism | any organism of microscopic size. |
| ~ aerobe | an organism (especially a bacterium) that requires air or free oxygen for life. |
| ~ anaerobe | an organism (especially a bacterium) that does not require air or free oxygen to live. |
| ~ crossbreed, hybrid, cross | (genetics) an organism that is the offspring of genetically dissimilar parents or stock; especially offspring produced by breeding plants or animals of different varieties or breeds or species.; "a mule is a cross between a horse and a donkey" |
| ~ polymorph | an organism that can assume more than one adult form as in the castes of ants or termites. |
| ~ congenator, congeneric, congener, relative | an animal or plant that bears a relationship to another (as related by common descent or by membership in the same genus). |
| ~ plankton | the aggregate of small plant and animal organisms that float or drift in great numbers in fresh or salt water. |
| ~ nekton | the aggregate of actively swimming animals in a body of water ranging from microscopic organisms to whales. |
| ~ parasite | an animal or plant that lives in or on a host (another animal or plant); it obtains nourishment from the host without benefiting or killing the host. |
| ~ host | an animal or plant that nourishes and supports a parasite; it does not benefit and is often harmed by the association. |
| ~ commensal | either of two different animal or plant species living in close association but not interdependent. |
| ~ myrmecophile | an organism such as an insect that habitually shares the nest of a species of ant. |
| ~ eucaryote, eukaryote | an organism with cells characteristic of all life forms except primitive microorganisms such as bacteria; i.e. an organism with `good' or membrane-bound nuclei in its cells. |
| ~ procaryote, prokaryote | a unicellular organism having cells lacking membrane-bound nuclei; bacteria are the prime example but also included are blue-green algae and actinomycetes and mycoplasma. |
| ~ zooid | one of the distinct individuals forming a colonial animal such as a bryozoan or hydrozoan. |
| ~ body part | any part of an organism such as an organ or extremity. |
| ~ tissue | part of an organism consisting of an aggregate of cells having a similar structure and function. |
| ~ fertilized ovum, zygote | (genetics) the diploid cell resulting from the union of a haploid spermatozoon and ovum (including the organism that develops from that cell). |
| ~ parthenote | a cell resulting from parthenogenesis. |
| ~ organic chemistry | the chemistry of compounds containing carbon (originally defined as the chemistry of substances produced by living organisms but now extended to substances synthesized artificially). |
| ~ clon, clone | a group of genetically identical cells or organisms derived from a single cell or individual by some kind of asexual reproduction. |
| ~ stratum | one of several parallel layers of material arranged one on top of another (such as a layer of tissue or cells in an organism or a layer of sedimentary rock). |
| ~ atavist, throwback | an organism that has the characteristics of a more primitive type of that organism. |
| ~ individual | a single organism. |
| ~ mascot | a person or animal that is adopted by a team or other group as a symbolic figure. |
| ~ mutant, mutation, sport, variation | (biology) an organism that has characteristics resulting from chromosomal alteration. |
| ~ postdiluvian | anything living after Noah's flood. |
| ~ sitter | an organism (person or animal) that sits. |
| ~ stander | an organism (person or animal) that stands.; "a crowd of sitters and standers" |
| ~ utterer, vocaliser, vocalizer | an organism that can utter vocal sounds.; "an utterer of foul oaths"; "is the giraffe a vocalizer?" |
| ~ fungus | an organism of the kingdom Fungi lacking chlorophyll and feeding on organic matter; ranging from unicellular or multicellular organisms to spore-bearing syncytia. |
| ~ nonvascular organism | organisms without vascular tissue: e.g. algae, lichens, fungi, mosses. |
| ~ relict | an organism or species surviving as a remnant of an otherwise extinct flora or fauna in an environment much changed from that in which it originated. |
| ~ saprophyte, saprophytic organism | an organism that feeds on dead organic matter especially a fungus or bacterium. |
| ~ saprobe | an organism that lives in and derives its nourishment from organic matter in stagnant or foul water. |
| ~ katharobe | an organism that lives in an oxygenated medium lacking organic matter. |
| ~ metabolic process, metabolism | the organic processes (in a cell or organism) that are necessary for life. |
| ~ morphogenesis | differentiation and growth of the structure of an organism (or a part of an organism). |
| ~ bioluminescent | (of living organisms) emitting light.; "fireflies are bioluminescent" |
| ~ cellular | characterized by or divided into or containing cells or compartments (the smallest organizational or structural unit of an organism or organization).; "the cellular construction of a beehive"; "any effective opposition to a totalitarian regime must be secretive and cellular" |
| ~ actinal | (of radiate organisms) located on the surface or end on which the mouth is situated. |
| n. (group) | 2. organism | a system considered analogous in structure or function to a living body.; "the social organism" |
| ~ system, scheme | a group of independent but interrelated elements comprising a unified whole.; "a vast system of production and distribution and consumption keep the country going" |
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