珪質けいしつ Noun Noun English jmdict 1 nouns which may take the genitive case particle 'no'noun (common) (futsuumeishi) silicic;siliceous
珪質海綿けいしつかいめん Noun English jmdict 1 noun (common) (futsuumeishi) siliceous sponge (any sponge other than those of class Calcarea)