Woodworm are very small creatures which make holes in wood by eating it.
2. uncountable noun
Woodworm is damage caused to wood, especially to the wooden parts of a house or to furniture, by woodworm making holes in the wood.
...treating the ground floor of a house for woodworm.
woodworm in British English
(ˈwʊdˌwɜːm)
noun
1.
any of various insect larvae that bore into wooden furniture, beams, etc, esp the larvae of the furniture beetle, Anobium punctatum, and the deathwatch beetle
2.
the condition caused in wood by any of these larvae