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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Origin and Etymology of psithyrus
New Latin, from Greek psithykos whispering, twittering
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