Search Result for "humectant": 
Wordnet 3.0

NOUN (1)

1. any substance that is added to another substance to keep it moist; 



The Collaborative International Dictionary of English v.0.48:

Humectant \Hu*mec"tant\, a. [L. humectans, p. pr.]
   Diluent. -- n. A diluent drink or medicine. [Obs.]
   [1913 Webster]


WordNet (r) 3.0 (2006):

humectant
    n 1: any substance that is added to another substance to keep it
         moist