blood brother

1. A male with the same parents as someone else (synset 109895920)
   "my brother still lives with our parents"
   is a type of: male sibling - a sibling who is male
   subtypes:

   • big brother - an older brother
   • little brother - a younger brother
   • half brother, half-brother, stepbrother - a brother who has only one parent in common with you
   same as: brother
2. A male sworn (usually by a ceremony involving the mingling of blood) to treat another as his brother (synset 109880059)
   is a type of: ally, friend - an associate who provides cooperation or assistance

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