timekeeper
NounWordNet 3.0
Webster's Dictionary (GCIDE)
Timekeeper \Time"keep`er\ (t[imac]m"k[=e]p`[~e]r), n.
1.A clock, watch, or other chronometer; a timepiece. [1913 Webster]
2.A person who keeps, marks, regulates, or determines the time. Specifically: [1913 Webster] (a) A person who keeps a record of the time spent by workmen at their work. [1913 Webster] (b) One who gives the time for the departure of conveyances. [1913 Webster] (c) One who marks the time in musical performances. [1913 Webster] (d) One appointed to mark and declare the time of participants in races or other contests. [1913 Webster]