AEOLIPYLE
Noun
aeolipyle (plural aeolipyles)
Alternative form of aeolipile
Source: Wiktionary
Æ*ol"i*pile, Æ*ol"i*pyle, n. Etym: [L. aeolipilae; Aeolus god of the
winds + pila a ball, or Gr. i. e., doorway of Æolus); cf. F.
éolipyle.]
Definition: An apparatus consisting chiefly of a closed vessel (as a globe
or cylinder) with one or more projecting bent tubes, through which
steam is made to pass from the vessel, causing it to revolve.
[Written also eolipile.]
Note: Such an apparatus was first described by Hero of Alexandria
about 200 years b. c. It has often been called the first steam
engine.
Source: Webster’s Unabridged Dictionary 1913 Edition