fratricide

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fratricide /ˈfrætrəˌsaɪd/ noun
plural fratricides
fratricide
/ˈfrætrəˌsaɪd/
noun
plural fratricides
Learner's definition of FRATRICIDE
[count]
: the crime of murdering your own brother or sister
also : a person who has committed this crime compare matricide, patricide

— fratricidal

/ˌfrætrəˈsaɪdl̟/ adjective