1 1 f. [LC] [AR] [GL] detritus very fine-grained rock consisting mainly of clay minerals, as for example the kaolin, montmoril · lonita, the illite, etc., which often also contains quartz, calcite, dolomite, organic matter and iron oxides, that should their coloration, is plastic when moist hardens by the action of fire. Clay vase Clay refractaria.1 2 f. [LC] by ext. All are made of the same arcilla.2 1 f. pl. [GLM] A group of phyllosilicates criptocristal coralinos.2 2 f. [GL] [GLM] Clay Mineral.
