Microorganism(n.) Any microscopic form of life; -- particularly applied to bacteria and similar organisms, esp. such are supposed to cause infectious diseases.
Thesaurus Entries
Euglena, adenovirus, aerobe, aerobic bacteria, aerobic organism, amoeba, anaerobe, anaerobic bacteria, anaerobic organism, animalcule, autotrophic organism, bacillus, bacteria, bacterium, being, bug, coccus, colon bacillus, creature, crumb, diatom, disease-producing microorganism, dot, drop, droplet, dyad, echovirus, enterovirus, filterable virus, flagellate, fleck, flyspeck, fungus, genetic individual, germ, gnat, grain, gram-negative bacteria, gram-positive bacteria, heterotrophic organism, individual, iota, jot, living being, living thing, microbe, microspore, microzoa, midge, minim, minutia, minutiae, mite, mold, monad, morphological individual, mote, nematode, nonfilterable virus, ont, organic being, organism, organization, paramecium, particle, pathogen, physiological individual, picornavirus, pinhead, pinpoint, point, protozoa, protozoon, reovirus, rhinovirus, rickettsia, salmonella, saprophyte, scrap, snip, snippet, speck, spirillum, spirochete, spore, sporozoon, staphylococcus, streptococcus, tetrad, tittle, triad, trypanosome, vanishing point, vibrio, virus, volvox, vorticellum, zooid, zoon, zoospore