Home › Words › P › pentalemmapentalemmapentalemma · noun — an argument analogous to a dilemma, but involving five alternatives.Definition from Wiktionary (CC BY-SA 3.0).EtymologyFrom penta- + lemma.nounAn argument analogous to a dilemma, but involving five alternatives.Definitions & examples from Wiktionary (CC BY-SA 3.0).