pentecosterEtymologyLearned borrowing from Ancient Greek πεντηκοστήρ (pentēkostḗr), from πεντηκοστύς (pentēkostús, “pentekostys”), from πεντηκοστός (pentēkostós, “fiftieth”).pentecoster means an officer who commands fifty men, particularly (historical) in the Spartan army. Lexicurio rates it Sui generis — a strength score of 87 out of 100.nounAn officer who commands fifty men, particularly (historical) in the Spartan army.“...they would have the command of the pentecoster, penteconter, or pentecoptater (for thus variously the title is written)...”