Oh, no, it's a completely ridiculous word. It's a ridiculous concept. Unfortunately, it's one that was going to cling to the amazons anyway, and it's really clear here that that's exactly the concept that the Bana are played for - that kind of amazon was outright inevitable and is therefore really obvious when it shows up, and may as well call a spade a spade.
Which is why I'm really, truly dumbfounded every time I read this story at just how flat and strawmanlike these Bana aren't, even a little bit. I come in expecting the old "ZOMG women who HATE MEN look how UNNATURAL and WRONG and our heroine hates it and isn't like them, she's not a scary feminist!" thing, and grit my teeth to be all offended... and then we get Nehebka, and Batiri, and Anahid, and that incredibly brilliant conversation where Nehebka just shuts Diana down and is completely, obviously, blatantly in the right, and even Faruka has layers and loyalty and a clear, human motive. And suddenly, the message changes; suddenly, it's not, "hey, that farcical thing you think feminism is, our heroine isn't that." Suddenly, it's "hey, that farcical thing you think feminism is -- look at what that really is, and notice that it isn't actually any different from us."