halfer

half +‎ -er

halfer (plural halfers)

1. (decision theory) With regard to the Sleeping Beauty problem: one who argues that the probability of heads is 1/2.

   Coordinate term: thirder

2. (obsolete) One who possesses or gives half only; one who shares.
   • 1625, Richard Montagu, Appello Caesarem: a just Appeale from two unjust Informers:

     ſuch Halfers in opinions

3. (obsolete) A gelded male fallow deer.
   • 1814, Samuel Pegge, Anonymian:

     Bucks , when cut , called Halfers

• “halfer”, in Webster’s Revised Unabridged Dictionary, Springfield, Mass.: G. & C. Merriam, 1913, →OCLC.