Brüder und Schwestern; Geschwister
Partnerschule; Schwesterschule
threesome including two women who are sisters
Schwesterstadt; Partnerstadt
women who have had sex with the same man; (lit.) pole sisters
Halbschwestern; Stiefschwestern
pogo sisters; women who have had sex with the same man
Begleitband; Folgeband; Fortsetzungsband
Schwesterchromatidenaustausch
sister language; related language; cognate
sister group; sister taxon