silicic acid

from The American Heritage® Dictionary of the English Language, 5th Edition.

• noun Hydrated silica, SiO2·nH₂O, produced by acidification of sodium silicate solution. Depending on the proportion of water, it may have any consistency from jelly to amorphous solid.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun chemistry any of a range of compounds, being hydrates of silica; they form silicates having complex polymeric structures

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• noun a jellylike substance (hydrated silica)