The Collaborative International Dictionary of English v.0.48:

Pendulous \Pen"du*lous\, a. [L. pendulus, fr. pendere to hang.
   Cf. Pendant, and cf. Pendulum.]
   1. Depending; pendent loosely; hanging; swinging. --Shak.
      "The pendulous round earth." --Milton.
      [1913 Webster]

   2. Wavering; unstable; doubtful. [R.] "A pendulous state of
      mind." --Atterbury.
      [1913 Webster]

   3. (Bot.) Inclined or hanging downwards, as a flower on a
      recurved stalk, or an ovule which hangs from the upper
      part of the ovary.
      [1913 Webster]

WordNet (r) 3.0 (2006):

pendulous
    adj 1: having branches or flower heads that bend downward;
           "nodding daffodils"; "the pendulous branches of a weeping
           willow"; "lilacs with drooping panicles of fragrant
           flowers" [syn: cernuous, drooping, nodding,
           pendulous, weeping]

Moby Thesaurus II by Grady Ward, 1.0:

46 Moby Thesaurus words for "pendulous":
   cascading, dangling, dependent, depending, drooping, falling,
   falling loosely, faltering, flowing, fluctuant, fluctuating,
   fluctuational, hanging, harmonic, hesitating, hung, libratory,
   nutational, oscillating, oscillatory, pendent, pending, pendulant,
   pendular, penduline, pensile, periodic, resonant, sagging,
   shilly-shally, shilly-shallying, suspended, swaying, swinging,
   tentative, undulating, undulatory, vacillating, vacillatory,
   vibratile, vibrating, vibratory, wavering, waving, weeping,
   wobbly