half-time

from WordNet (r) 3.0 (2006)

half-time
    adv 1: for less than the standard number of hours; "he works
           part-time" [syn: {half-time}, {part-time}] [ant: {full-
           time}]
    adj 1: involving half the standard or customary time for an
           activity; "he had two years of half-time training"

from The Collaborative International Dictionary of English v.0.48

halftime \half"time`\ n.
   an intermission between the first and second half of a game,
   especially a football game. Also used attributively, as the
   halftime entertainment
   [WordNet 1.5 +PJC] Half tone

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