Meaning of CLAY in English
As the sediment of water remaining in pits or in streets, the word is used frequently in the Old Testament. (Psalms 18:42; Isaiah 57:20; Jeremiah 38:6) and in the New Testament, (John 9:6) a mixture of sand or dust with spittle. It is also found in the sense of potter's clay. (Isaiah 41:25) The great seat of the pottery of the present day in Palestine is Gaza, where are made the vessels in dark-blue clay so frequently met with. Another use of clay was for sealing. (Job 38:14) Our Lord's tomb may have been thus sealed, (Matthew 27:66) as also the earthen vessel containing the evidences of Jeremiah's purchase. (Jeremiah 32:14) The seal used for public documents was rolled on the moist clay, and the tablet was then placed in the fire and baked.
Smith's Bible English dictionary. Английский библейский словарь Смита. 2012