sewer-blockn. a stoneware brick used for building the walls of sewers.
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society > occupation and work > materials > derived or manufactured material > clay compositions > baked clay > brick > [noun] > brick for specific use
paving brick1703
lump1787
right1884
sewer-block1884
1884 Internat. Health Exhib. Official Catal. 50/1 Sanitary stoneware..including drain-pipes..sewer-blocks [etc.].