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Webster 1913 Edition

Noun.

[L.

insolubilitas

: cf. F.

insolubilité

The quality or state of being insoluble or not dissolvable, as in a fluid.

The quality of being inexplicable or insolvable.

Noun.

[from insoluble.] The quality of not being soluble or dissolvable, particularly in a fluid.

insolubility ‎(usually uncountable, plural insolubilities)

being insoluble