The Collaborative International Dictionary of English v.0.48:

Pendant \Pend"ant\ (p[e^]nd"ant), n. [F., orig. p. pr. of pendre
   to hang, L. pendere. Cf. Pendent, Pansy, Pensive,
   Poise, Ponder.]
   1. Something which hangs or depends; something suspended; a
      hanging appendage, especially one of an ornamental
      character, as to a chandelier or an eardrop; also, an
      appendix or addition, as to a book.
      [1913 Webster]

            Some hang upon the pendants of her ear. --Pope.
      [1913 Webster]

            Many . . . have been pleased with this work and its
            pendant, the Tales and Popular Fictions.
                                                  --Keightley.
      [1913 Webster]

   2. Hence: An ornamental object or piece of jewelry with a
      hook so that it can be hung from a chain around the neck.
      [PJC]

   3. (Arch.) A hanging ornament on roofs, ceilings, etc., much
      used in the later styles of Gothic architecture, where it
      is of stone, and an important part of the construction.
      There are imitations in plaster and wood, which are mere
      decorative features. "[A bridge] with . . . pendants
      graven fair." --Spenser.
      [1913 Webster]

   4. (Fine Arts) One of a pair; a counterpart; as, one vase is
      the pendant to the other vase.
      [1913 Webster]

   5. A pendulum. [Obs.] --Sir K. Digby.
      [1913 Webster]

   6. The stem and ring of a watch, by which it is suspended.
      [U.S.] --Knight.
      [1913 Webster]

   Pendant post (Arch.), a part of the framing of an open
      timber roof; a post set close against the wall, and
      resting upon a corbel or other solid support, and
      supporting the ends of a collar beam or any part of the
      roof.
      [1913 Webster]

WordNet (r) 3.0 (2006):

pendant
    adj 1: held from above; "a pendant bunch of grapes" [syn:
           pendent, pendant, dependent]
    n 1: an adornment that hangs from a piece of jewelry (necklace
         or earring) [syn: pendant, pendent]
    2: branched lighting fixture; often ornate; hangs from the
       ceiling [syn: chandelier, pendant, pendent]

Moby Thesaurus II by Grady Ward, 1.0:

127 Moby Thesaurus words for "pendant":
   accession, accessory, accompaniment, addenda, addendum, additament,
   addition, additive, additory, additum, adjunct, adjuvant, ally,
   alter ego, analogon, analogue, annex, annexation, appanage,
   appendage, appendant, appurtenance, appurtenant, arras, associate,
   attachment, augment, augmentation, banner, bob, brother,
   chandelier, close copy, close match, coattail, coda, cognate,
   color, companion, complement, concomitant, congenator, congener,
   continuation, coordinate, corollary, correlate, correlative,
   correspondent, counterpart, curtain, drape, drapery, drop,
   ear lobe, earring, ensign, equivalent, extension, extrapolation,
   fellow, fixture, flag, flap, fringe, hammock, hanger, hanging,
   icicle, image, increase, increment, jack, kindred spirit, lappet,
   like, likeness, lobation, lobe, lobule, locket, mate, medallion,
   near duplicate, necklace, obverse, offshoot, ornament, parallel,
   pendulum, pennant, pennon, picture, pigtail, plumb bob, queue,
   reciprocal, reinforcement, second self, side effect, side issue,
   similitude, simulacrum, sister, skirt, soul mate, stalactite,
   standard, streamer, such, suchlike, supplement, swing, tail,
   tailpiece, tally, tapestry, tassel, the like of, the likes of,
   tippet, trail, train, twin, undergirding, uvula, wattle