n. pl. hal·o·bac·te·ri·a (-tîrē-ə)
Any of various rod-shaped, halophilic, pigmented archaea of the genus Halobacterium, some of which produce bacteriorhodopsin to facilitate ATP synthesis during periods of oxygen deficiency.
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Indo-European & Semitic Roots Appendices
Thousands of entries in the dictionary include etymologies that trace their origins back to reconstructed proto-languages. You can obtain more information about these forms in our online appendices:
The Indo-European appendix covers nearly half of the Indo-European roots that have left their mark on English words. A more complete treatment of Indo-European roots and the English words derived from them is available in our Dictionary of Indo-European Roots.