The Collaborative International Dictionary of English v.0.48:

Timbrel \Tim"brel\, n. [Dim. of OE. timbre, OF. timbre; probably
   fr. L. typmanum, Gr. ? a kettledrum, but influenced perhaps
   by Ar. tabl a drum; cf. Per. tambal a drum. See Tympanum,
   and cf. 2d Timbre, Tymbal.] (Mus.)
   A kind of drum, tabor, or tabret, in use from the highest
   antiquity.
   [1913 Webster]

         Miriam . . . took a timbrel in her hand, and all the
         women went out after her with timbrels and with dances.
                                                  --Ex. xv. 20.
   [1913 Webster] Timbreled

WordNet (r) 3.0 (2006):

timbrel
    n 1: small hand drum similar to a tambourine; formerly carried
         by itinerant jugglers

Moby Thesaurus II by Grady Ward, 1.0:

27 Moby Thesaurus words for "timbrel":
   bongo drum, conga, drum, drumhead, drumskin, drumstick, jazz stick,
   kettle, kettledrum, membranophone, side drum, snare, snare drum,
   tabor, taboret, tabret, tam-tam, tambourine, tenor drum, timpani,
   tom-tom, troll-drum, tymp stick, tympan, tympanon, tympanum,
   war drum



Easton's 1897 Bible Dictionary:

Timbrel
   (Heb. toph), a small drum or tambourine; a tabret (q.v.). The
   antiquity of this musical instrument appears from the scriptural
   allusions to it (Gen. 31:27; Ex. 15:20; Judg. 11:34, etc.) (See MUSIC.)