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sponges with siliceous spicules that have six rays; choanocytes are restricted to finger-shaped chambers class Hyalospongiae , Hyalospongiae
light soil consisting of siliceous diatom remains and often used as a filtering material diatomaceous earth , diatomite , kieselguhr
siliceous sponge (with glassy spicules) of the class Hyalospongiae glass sponge
hard coarse-grained siliceous sandstone grit , gritrock , gritstone
weathered and decomposed siliceous limestone; in powdered form it is used in polishing rottenstone , tripoli
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