'Humectant' definitions:
Definition of 'humectant'
From: WordNet
noun
Any substance that is added to another substance to keep it moist
Definition of 'Humectant'
From: GCIDE
- Humectant \Hu*mec"tant\, a. [L. humectans, p. pr.] Diluent. -- n. A diluent drink or medicine. [Obs.] [1913 Webster]