Definition of black beetle
(Entry 1 of 2)
: either of two glossy black burrowing beetles that are very destructive to turf and certain cultivated plants in Australia:
a : a beetle (Heteronychus sanctae-helenae) that was accidentally introduced from Africa
b : a native beetle (Metanastes vulgivagus)
Definition of blackbeetle (Entry 2 of 2)
: oriental cockroach
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