Artificial intelligent assistant

sister-german

sister-german
  [f. sister n. + german a.1]
  A sister through both parents; a full sister.

1382 Wyclif 1 Kings xi. 19 The sister germayn of his wiif Taphnes. c 1489 Caxton Sonnes of Aymon vii. 159, I have gyven my suster germayne to Reynawde for his wyff. 1490Eneydos xxi. 75 She dyde doo calle anne her suster germayne. 1523 Ld. Berners tr. Froiss. I. xxi. 31 Isabell of Englande..was suster germayne to king Charles last deed. 1570 J. Dee Math. Pref. d ij b, Picture and Sculpture, are Sisters germaine.

Oxford English Dictionary

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