wife-in-law
n.— «In regard to what word your sister should use to describe her former husband’s new spouse, we have heard a few terms to describe that relationship: You used one of them, “wife-in-law.” We have also heard the term “stepwife,” but neither seems quite appropriate, the reason being that both use the term “wife” as the root word, and the relationship in question has nothing to do with being a wife to each other, or even that both women have been a wife to the same man.» —“Here’s one way to introduce your ex’s current spouse” by Jann Blackstone-Ford, Sharyl Jupe Mercury News (San Jose, California) June 15, 2005. (source: Double-Tongued Dictionary)
Further reading
Is there such a thing as a “neutral” accent, and if so what does it sound like? And that quirk in the way southern Californians talk about freeways. They’ll say things like take the 405 and get on the 8. Why the definite article...
Floordrobe is the new word for an old habit: piling your clothes on the floor instead of putting them away. The Oxford English Dictionary recently added an entry for it, defining floordrobe as “an untidy heap of discarded clothing left on the floor...