Wordnet 3.0
NOUN (1)
1. 
 a demon personifying death; 
 messenger of the underworld goddess Ereshkigal bringing death to mankind; 
[syn: Namtar, Namtaru]
The Collaborative International Dictionary of English v.0.48:
Namtar \Namtar\, Namtaru \Namtaru\prop. n. (Sumerian and
   Akkadian mythology)
   A demon personifying death; messenger of the underworld
   goddess Ereshkigal bringing death to mankind.
   Syn: Namtaru.
        [WordNet 1.5]
WordNet (r) 3.0 (2006):
Namtaru
    n 1: a demon personifying death; messenger of the underworld
         goddess Ereshkigal bringing death to mankind [syn:
         Namtar, Namtaru]