hydrosoln.

1864 T. Graham in Proc. Royal Soc. 13 337 If I may be allowed to distinguish the liquid and gelatinous hydrates of silicic acid by the irregularly formed terms of hydrosol and hydrogel of silicic acid, the two corresponding alcoholic bodies now introduced may be named the alcosol and alcogel of silicic acid.

1895 J. M. Thomson & A. G. Bloxam Bloxam's Chem. (ed. 8) 123 Colloids..can generally exist in solution (the hydrosol form), but are apt to separate as a jelly (the hydrogel form) from such solutions.

1920 Nature 105 372/2 The lubricating graphite..reduced to particles of colloidal dimensions and sold under the trade-names of ‘Aquadag’ and ‘Hydrosol’.

1937 Industr. & Engin. Chem. (News ed.) 10 Mar. 104/2 Gold hydrosols nearly always contain unreduced gold compounds, which are fully reduced to metal hydrosols under suitable conditions.

1938 R. G. Torrens Dental Dis. vi. 90 Gelatine is a hydrosol when warm and a hydrogel when cold.

1954 R. L. Parker tr. P. Niggli Rocks & Mineral Deposits xi. 463 In mineralogy the hydrosols—i.e., the colloidal solutions with water as the dispersing medium—are almost the only sols of any importance.