7 letters · 13 points in Scrabble
noun a minute life form (especially a disease-causing bacterium); the term is not in technical use
originBorrowed from French microbe, from Ancient Greek μικρός (mikrós, “small”) and βίος (bíos, “life”). By surface analysis, micro- + -obe.
Etymology from Wiktionary, CC BY-SA 3.0