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Definition of Step-sibling
1. Noun. The offspring of one's stepfather or stepmother who is not the offspring of one's mother and is not the offspring of one's father. ¹
2. Noun. The stepchild of one's father or mother which is not one's half-sibling. ¹
¹ Source: wiktionary.com
Lexicographical Neighbors of Step-sibling
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