a name for microorganisms similar to bacteria but seemingly more primitive, 1977, from archaeo- "primitive, ancient" + bacteria. Singular is archaebacterium.
Entries linking to archaebacteria
archaeo-
before vowels archae-, word-forming element in scientific compounds meaning "ancient, olden, primitive, primeval, from the beginning," from Latinized form of Greek arkhaios "ancient, primeval," from arkhē "beginning," verbal noun of arkhein "to be the first," hence "to begin" (see archon).
bacteria n.
"unicellular microorganisms which lack an organized nucleus," and sometimes cause disease, 1847, plural of Modern Latin bacterium, from Greek bakterion "small staff," diminutive of baktron "stick, rod, staff, cudgel." So called because the first ones observed were rod-shaped. Introduced as a scientific word 1838 by German naturalist Christian Gottfried Ehrenberg. A classical plural sometimes also erroneously used as a singular.
The Greek word is from a PIE *bak- "staff used for support, peg" (compare Latin baculum "rod, walking stick;" Irish bacc, Welsh bach "hook, crooked staff;" Middle Dutch pegel "peg, pin, bolt"). De Vaan writes, "Since *b was very rare in PIE, and Celtic shows an unexplained geminate, we are probably dealing with a loanword from an unidentified source."