Pronunciation : ? or Ae.
Definition : Defn: A diphthong in the Latin language; used also by the Saxon writers. It answers to the Gr. ? was generally replaced by a, the long e or ee. In derivatives from Latin words with ae, it is mostly superseded by e. For most words found with this initial combination, the reader will therefore search under the letter E.
Source : Webster's Unabridged Dictionary, 1913