Webster's 1913 Dictionary
PROPYLAEUM
Prop `y *læ "um, n.; pl. Propylæa. Etym: [L., fr. Gr. (Anc. Classical Arch. )
Defn: Any court or vestibule before a building or leading into any inclosure.
New American Oxford Dictionary
propyla
prop y la |ˈpräpələ ˈprɑpələ | plural form of propylon.
propylaeum
prop y lae um |ˌpräpəˈlēəm, ˌprō -ˌprɑpəˈliəm | ▶noun ( pl. propylaea |-ˈlēə | ) the structure forming the entrance to a temple. • (the Propylaeum ) the entrance to the Acropolis at Athens. ORIGIN via Latin from Greek propulaion, neuter (used as a noun ) of propulaios ‘before the gate, ’ from pro ‘before ’ + pulē ‘gate. ’
Oxford Dictionary
propyla
pro |pyla plural form of propylon.
propylaeum
propylaeum |ˌprɒpɪˈliːəm | ▶noun ( pl. propylaea |-ˈliːə | ) Architecture the structure forming the entrance to a temple. • (the Propylaeum ) the entrance to the Acropolis at Athens. ORIGIN via Latin from Greek propulaion, neuter (used as a noun ) of propulaios ‘before the gate ’, from pro ‘before ’ + pulē ‘gate ’.
Duden Dictionary
Propyläen
Pro py lä en Pluralwort Architektur , die |Propyl ä en |Pluraletantum lateinisch propylaea < griechisch propýlaia = Vorhof, Vorbau, aus: pró = vor und pýlē = Tor, Pforte (in der Antike ) meist als offene Säulenhalle ausgebildete Vorhalle (besonders eines Tempels )