| halobacterium | A genus of halobacteriaceae whose growth requires a high concentration of salt. Binary fission is by constriction. (12 Dec 1998) |
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| Halobacterium halobium | Photosynthetic (halophilic) bacterium that has patches of purple membrane containing the pigment bacteriorhodopsin. (18 Nov 1997) |
| halobacterium salinarium | A species of halophilic archaea found in salt lakes. Some strains form a purple membrane under anaerobic conditions. (12 Dec 1998) |