psithyrus
noun
psith·y·rus
| \ ˈsithərəs\
Definition of psithyrus
1
capitalized
: a genus of large bees resembling bumblebees but lacking the pollen-collecting apparatus and the worker caste and being parasitic in the nests of bumblebees
2
plural psithyri\ -ˌrī\
: any bee of the genus Psithyrus
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