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

Easton's 1897 Bible Dictionary:

Timothy
   honouring God, a young disciple who was Paul's companion in many
   of his journeyings. His mother, Eunice, and his grandmother,
   Lois, are mentioned as eminent for their piety (2 Tim. 1:5). We
   know nothing of his father but that he was a Greek (Acts 16:1).
   He is first brought into notice at the time of Paul's second
   visit to Lystra (16:2), where he probably resided, and where it
   seems he was converted during Paul's first visit to that place
   (1 Tim. 1:2; 2 Tim. 3:11). The apostle having formed a high
   opinion of his "own son in the faith," arranged that he should
   become his companion (Acts 16:3), and took and circumcised him,
   so that he might conciliate the Jews. He was designated to the
   office of an evangelist (1 Tim. 4:14), and went with Paul in his
   journey through Phrygia, Galatia, and Mysia; also to Troas and
   Philippi and Berea (Acts 17:14). Thence he followed Paul to
   Athens, and was sent by him with Silas on a mission to
   Thessalonica (17:15; 1 Thess. 3:2). We next find him at Corinth
   (1 Thess. 1:1; 2 Thess. 1:1) with Paul. He passes now out of
   sight for a few years, and is again noticed as with the apostle
   at Ephesus (Acts 19:22), whence he is sent on a mission into
   Macedonia. He accompanied Paul afterwards into Asia (20:4),
   where he was with him for some time. When the apostle was a
   prisoner at Rome, Timothy joined him (Phil. 1:1), where it
   appears he also suffered imprisonment (Heb. 13:23). During the
   apostle's second imprisonment he wrote to Timothy, asking him to
   rejoin him as soon as possible, and to bring with him certain
   things which he had left at Troas, his cloak and parchments (2
   Tim. 4:13). According to tradition, after the apostle's death he
   settled in Ephesus as his sphere of labour, and there found a
   martyr's grave.