variants: or ruby-tailed fly \ˈ⸗⸗ˌ⸗-​ \

Definition of rubytail 

: any of various cuckoo wasps especially : a common European insect (Chrysis viridula) having part of the abdomen metallic red

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First Known Use of rubytail

1826, in the meaning defined above

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The first known use of rubytail was in 1826

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