# opposite of disjoint

Sets whose intersection is the empty set are called disjoint. What is the opposite of a disjoint set? For example the sets $\{1,2\}$ and $\{2,3\}$ satisfy this condition. I know that you can just say not-disjoint. But I was wondering if there was a specific term for it. I ask this because someone told me that this term existed but that he couldnt remeber. I have searched extensively but I haven't found it.

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I always say two sets "intersect" or that they "have nonempty intersection". – Alex Becker Jul 10 '12 at 1:51
"Non-disjoint". – MJD Jul 10 '12 at 1:52
They are joint! – William Jul 10 '12 at 1:53

If $A\cap B \not= \emptyset$, I say, "$A$ meets $B$."
Is there any notation you can use to indicate this? I recall seeing $A\uparrow B$` but I cannot find it back – ggll Sep 18 '15 at 18:16