"cross term" meaning in English

{
  "forms": [
    {
      "form": "cross terms",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "cross term (plural cross terms)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
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          "name": "Pages with 1 entry",
          "parents": [],
          "source": "w"
        },
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          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "en",
          "name": "Linear algebra",
          "orig": "en:Linear algebra",
          "parents": [
            "Algebra",
            "Mathematics",
            "Formal sciences",
            "Sciences",
            "All topics",
            "Fundamental"
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          "source": "w"
        }
      ],
      "glosses": [
        "In a quadratic form, a term which is not a squared variable; i.e., a term with more than one variable."
      ],
      "id": "en-cross_term-en-noun-gLBO13Rv",
      "links": [
        [
          "linear algebra",
          "linear algebra"
        ],
        [
          "quadratic form",
          "quadratic form"
        ],
        [
          "term",
          "term"
        ],
        [
          "squared",
          "squared"
        ]
      ],
      "raw_glosses": [
        "(linear algebra) In a quadratic form, a term which is not a squared variable; i.e., a term with more than one variable."
      ],
      "synonyms": [
        {
          "word": "cross-product term"
        }
      ],
      "topics": [
        "linear-algebra",
        "mathematics",
        "sciences"
      ]
    }
  ],
  "word": "cross term"
}

{
  "forms": [
    {
      "form": "cross terms",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "cross term (plural cross terms)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "English countable nouns",
        "English entries with incorrect language header",
        "English lemmas",
        "English multiword terms",
        "English nouns",
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        "en:Linear algebra"
      ],
      "glosses": [
        "In a quadratic form, a term which is not a squared variable; i.e., a term with more than one variable."
      ],
      "links": [
        [
          "linear algebra",
          "linear algebra"
        ],
        [
          "quadratic form",
          "quadratic form"
        ],
        [
          "term",
          "term"
        ],
        [
          "squared",
          "squared"
        ]
      ],
      "raw_glosses": [
        "(linear algebra) In a quadratic form, a term which is not a squared variable; i.e., a term with more than one variable."
      ],
      "topics": [
        "linear-algebra",
        "mathematics",
        "sciences"
      ]
    }
  ],
  "synonyms": [
    {
      "word": "cross-product term"
    }
  ],
  "word": "cross term"
}