Source : Webster's Revised Unabridged Dictionary (1913)

Carborundum \Car`bo*run"dum\, [Carbon + corundum.]
   A beautiful crystalline compound, {SiC}, consisting of carbon
   and silicon in combination; 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.

Source : WordNet®

sic
     adv : intentionally so written (used after a printed word or
           phrase)
     v : urge a dog to attack someone [syn: {set}]
     [also: {sicking}, {sicked}]