10 letters · 19 points in Scrabble
noun a unicellular organism having cells lacking membrane-bound nuclei; bacteria are the prime example but also included are blue-green algae and actinomycetes and mycoplasma
originEtymology tree English pro- English karyon English -ote English prokaryote From pro- + karyon + -ote.
Etymology from Wiktionary, CC BY-SA 3.0