"reverse curve" meaning in English

{
  "forms": [
    {
      "form": "reverse curves",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "reverse curve (plural reverse curves)",
      "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"
        }
      ],
      "examples": [
        {
          "ref": "1945 July and August, “Notes and News: \"A Nice Day's Work\"”, in Railway Magazine, page 235",
          "text": "One driver told him that a fireman who did not know the route might easily go \"over the side\" between Corby and Harringworth, unless warned beforehand of the reverse curves; he himself, in his firing days, used to try so to plan his firing that it was unnecessary to add any more coal while passing over this stretch at speed.",
          "type": "quotation"
        },
        {
          "ref": "1947 September and October, “The Why and The Wherefore: Definition of a Reverse Curve”, in Railway Magazine, page 334",
          "text": "Chambers's Technical Dictionary defines a reverse curve as \"a curve composed of two arcs, of the same or different radii, with their centres on opposite sides of the curve.\" In other words, a reverse curve is an \"S\" curve.",
          "type": "quotation"
        },
        {
          "ref": "1959 November, G. H. Robin, “Railways to Helensburgh—a pre-electrification retrospect”, in Trains Illustrated, page 544",
          "text": "Some slight alterations in alignment were necessary to provide the pier line and the station is approached by severe reverse curves in both directions.",
          "type": "quotation"
        }
      ],
      "glosses": [
        "A curve to the left or right which immediately curves in the opposite direction, and which is basically S-shaped."
      ],
      "id": "en-reverse_curve-en-noun-LSIek-sD",
      "links": [
        [
          "S-shaped",
          "S-shaped"
        ]
      ],
      "related": [
        {
          "word": "S-bend"
        }
      ]
    }
  ],
  "word": "reverse curve"
}

{
  "forms": [
    {
      "form": "reverse curves",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "reverse curve (plural reverse curves)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "related": [
    {
      "word": "S-bend"
    }
  ],
  "senses": [
    {
      "categories": [
        "English countable nouns",
        "English entries with incorrect language header",
        "English lemmas",
        "English multiword terms",
        "English nouns",
        "English terms with quotations"
      ],
      "examples": [
        {
          "ref": "1945 July and August, “Notes and News: \"A Nice Day's Work\"”, in Railway Magazine, page 235",
          "text": "One driver told him that a fireman who did not know the route might easily go \"over the side\" between Corby and Harringworth, unless warned beforehand of the reverse curves; he himself, in his firing days, used to try so to plan his firing that it was unnecessary to add any more coal while passing over this stretch at speed.",
          "type": "quotation"
        },
        {
          "ref": "1947 September and October, “The Why and The Wherefore: Definition of a Reverse Curve”, in Railway Magazine, page 334",
          "text": "Chambers's Technical Dictionary defines a reverse curve as \"a curve composed of two arcs, of the same or different radii, with their centres on opposite sides of the curve.\" In other words, a reverse curve is an \"S\" curve.",
          "type": "quotation"
        },
        {
          "ref": "1959 November, G. H. Robin, “Railways to Helensburgh—a pre-electrification retrospect”, in Trains Illustrated, page 544",
          "text": "Some slight alterations in alignment were necessary to provide the pier line and the station is approached by severe reverse curves in both directions.",
          "type": "quotation"
        }
      ],
      "glosses": [
        "A curve to the left or right which immediately curves in the opposite direction, and which is basically S-shaped."
      ],
      "links": [
        [
          "S-shaped",
          "S-shaped"
        ]
      ]
    }
  ],
  "word": "reverse curve"
}