D defs.my
Entry 1 sense Webster, 1913

Carborundum

/(kär`bō̇*rŭn"dŭm)/ · Car·bo·run·dum · IPA /ˌkɑɹ.bəˈɹʌn.dəm/
01 A beautiful crystalline compound, silicon carbide (SiC), consisting of carbon and silicon in combination; -- also called carbon silicide. I…
  1. 1.
    A beautiful crystalline compound, silicon carbide (SiC), consisting of carbon and silicon in combination; -- also called carbon silicide. It is made by heating carbon and sand together in an electric furnace. The commercial article is dark-colored and iridescent. It is harder than emery, and is used as an abrasive. Also: silicon carbide, carbon silicide