外がい積せき

noun

cross product; vector product; outer product

Mathematical term for the binary operation on two vectors in three-dimensional space, producing a vector perpendicular to both. In broader contexts, 'outer product' may refer to the tensor product of vectors.

• 外がい積せきはベクトルの向むきに注ちゅう意いが必ひつ要ようだ。

  For the cross product, you need to pay attention to the direction of the vectors.

• 物ぶつ理り学がくでは、力ちからのモーメントを外がい積せきで表あらわす。

  In physics, the moment of a force is expressed using the cross product.