PTS Pali-English dictionary - The Pali Text Society's Pali-English dictionary
Vītaṁsa
Vītaṁsa,[fr.vi+tan,according to BR.The word is found in late Sk.(lexicogr.) as vītaṁsa.BR compare Sk.avataṁsa (garland:see P.vaṭaṁsa) & uttaṁsa.The etym.is not clear] a bird-snare (BR.:“jedes zum Fangen von Wild & Vögeln dienende Gerät”),a decoy bird Th.1,139.Kern,Toev.s.v.“vogelstrik.” (Page 644)
Buddhist Dictionary of Pali Proper Names by G P Malalasekera
Vītamsā
Vītamsā:One of the ten rivers flowing from Himālaya.Mil.114; see Mil.Trs.i.xliv,for a suggested identification with Vitastā,the modern Bihat (or Jhelum).
U Hau Sein’s Pāḷi-Myanmar Dictionary ပါဠိျမန္မာ အဘိဓာန္(ဦးဟုတ္စိန္)