'Solubleness' definitions:

Definition of 'solubleness'

From: WordNet
noun
The property of being dissoluble; "he measure the dissolubility of sugar in water" [syn: dissolubility, solubleness]

Definition of 'Solubleness'

From: GCIDE
  • Solubleness \Sol"u*ble*ness\, n. Quality or state of being soluble. [1913 Webster] Solus