"reactant" meaning in Englisch

{
  "categories": [
    {
      "kind": "other",
      "name": "Anagramm sortiert (Englisch)",
      "parents": [],
      "source": "w"
    },
    {
      "kind": "other",
      "name": "Englisch",
      "parents": [],
      "source": "w"
    },
    {
      "kind": "other",
      "name": "Rückläufige Wörterliste (Englisch)",
      "parents": [],
      "source": "w"
    },
    {
      "kind": "other",
      "name": "Substantiv (Englisch)",
      "parents": [],
      "source": "w"
    },
    {
      "kind": "other",
      "name": "Wartung roter Link en-Substantiv",
      "parents": [],
      "source": "w"
    },
    {
      "kind": "other",
      "name": "Siehe auch",
      "orig": "siehe auch",
      "parents": [],
      "source": "w"
    }
  ],
  "forms": [
    {
      "form": "the reactant",
      "tags": [
        "singular"
      ]
    },
    {
      "form": "the reactants",
      "tags": [
        "plural"
      ]
    }
  ],
  "hyphenation": "re·ac·tant",
  "lang": "Englisch",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "examples": [
        {
          "ref": "http://www.linguee.de/englisch-deutsch/uebersetzung/reactant.html",
          "text": "„Moreover, there is no storage technology yet for hydrogen as a reactant in fuel cells that avoids heavy energy losses resulting from cooling to extremely low temperatures or from very high tank-filling pressure.“"
        }
      ],
      "glosses": [
        "Reaktant"
      ],
      "id": "de-reactant-en-noun-4uLMDztc",
      "sense_index": "1"
    }
  ],
  "word": "reactant"
}

{
  "categories": [
    "Anagramm sortiert (Englisch)",
    "Englisch",
    "Rückläufige Wörterliste (Englisch)",
    "Substantiv (Englisch)",
    "Wartung roter Link en-Substantiv",
    "siehe auch"
  ],
  "forms": [
    {
      "form": "the reactant",
      "tags": [
        "singular"
      ]
    },
    {
      "form": "the reactants",
      "tags": [
        "plural"
      ]
    }
  ],
  "hyphenation": "re·ac·tant",
  "lang": "Englisch",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "examples": [
        {
          "ref": "http://www.linguee.de/englisch-deutsch/uebersetzung/reactant.html",
          "text": "„Moreover, there is no storage technology yet for hydrogen as a reactant in fuel cells that avoids heavy energy losses resulting from cooling to extremely low temperatures or from very high tank-filling pressure.“"
        }
      ],
      "glosses": [
        "Reaktant"
      ],
      "sense_index": "1"
    }
  ],
  "word": "reactant"
}