PIYEDRAThis word is from the Spanish piedra (meaning: stone). The following is derived from the Spanish phrase piedra alumbre. piyédralúmbre: tawasmisspelling: piedrediasKAHULUGAN SA TAGALOGpiyédra: batóPIEDRERIASBATONEOLITIKOPALEOLITIKOKIDNEYRINYON