| Spirillum (n.) A genus of common motile microorganisms (Spirobacteria) having the form of spiral-shaped filaments. One species is said to be the cause of relapsing fever. Thesaurus Entries Euglena, adenovirus, aerobe, aerobic bacteria, amoeba, anaerobe, anaerobic bacteria, animalcule, bacillus, bacteria, bacterium, bug, coccus, colon bacillus, diatom, disease-producing microorganism, dyad, echovirus, enterovirus, filterable virus, flagellate, fungus, germ, gram-negative bacteria, gram-positive bacteria, microbe, microorganism, microspore, microzoa, mold, monad, nematode, nonfilterable virus, paramecium, pathogen, picornavirus, protozoa, protozoon, reovirus, rhinovirus, rickettsia, salmonella, saprophyte, spirillum, spirochete, spore, sporozoon, staphylococcus, streptococcus, tetrad, triad, trypanosome, vibrio, virus, volvox, vorticellum, zoospore |