The Collaborative International Dictionary of English v.0.48:

Ephah \E"phah\, or Epha \E"pha\, n. [Heb. '[=e]ph[=a]h.]
   A Hebrew dry measure, supposed to be equal to two pecks and
   five quarts. Ten ephahs make one homer.
   [1913 Webster]

WordNet (r) 3.0 (2006):

epha
    n 1: an ancient Hebrew unit of dry measure equal to about a
         bushel [syn: ephah, epha]