The Collaborative International Dictionary of English v.0.48:

Timothy \Tim"o*thy\, n., or Timothy grass \Tim"o*thy grass`\
   [From Timothy Hanson, who carried the seed from New England
   to Maryland about 1720.] (Bot.)
   A kind of grass (Phleum pratense) with long cylindrical
   spikes; -- called also herd's grass, in England,
   cat's-tail grass, and meadow cat's-tail grass. It is much
   prized for fodder. See Illustration in Appendix.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Timothy \Tim"o*thy\ (Bible)
   A disciple and companion of St. Paul. He was the son of a
   Greek and a Jewess, and his home was either at Derbe, or
   Lystra in Lycaonia. Paul set him apart as a minister of the
   new gospel, and after preaching in Macedonia and Achaia, he
   went, at Paul's request to Ephesus, and accompanied the
   apostle to Jerusalem. It was to him that the two epistles to
   Timothy were addressed by the apostle Paul. According to
   tradition, Timothy suffered martyrdom under Domitian. --The
   Student's Cyclopedia, 1897.
   [PJC]

WordNet (r) 3.0 (2006):

timothy
    n 1: grass with long cylindrical spikes grown in northern United
         States and Europe for hay [syn: timothy, herd's grass,
         Phleum pratense]
    2: a disciple of Saint Paul who became the leader of the
       Christian community at Ephesus
    3: a grass grown for hay