half-blood (n.)youdaoicibaDictYouDict[half-blood 词源字典]
"person of mixed race," 1826; see half + blood (n.). As an adjective, "born of one parent the same and one different," from 1550s. Half-blooded as an adjective in this sense is from c. 1600.[half-blood etymology, half-blood origin, 英语词源]