'Carborundum' definitions:
Definition of 'carborundum'
From: WordNet
noun
An abrasive composed of silicon carbide crystals
Definition of 'Carborundum'
From: GCIDE
- Carborundum \Car`bo*run"dum\ (k[aum]r`b[-o]*r[u^]n"d[u^]m), [a trade name, from Carbon + corundum.] 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. [Webster 1913 Suppl.] carborundum cloth