1 文書を見つけるための辞書。

• product, cartesian product, intersection
• 交叉点, 交差点, 交わり, 直積集合, 積
• the set of elements common to two or more sets; "the set of red hats is the intersection of the set of hats and the set of red things"
• 2つ以上の集合に共通する要素の集合