"periastron" meaning in English

{
  "antonyms": [
    {
      "word": "apastron"
    }
  ],
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "grc",
        "3": "περί",
        "4": "",
        "5": "around"
      },
      "expansion": "Ancient Greek περί (perí, “around”)",
      "name": "der"
    }
  ],
  "etymology_text": "From Ancient Greek περί (perí, “around”) + ἄστρον (ástron, “star”).",
  "forms": [
    {
      "form": "periastrons",
      "tags": [
        "plural"
      ]
    },
    {
      "form": "periastra",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "+",
        "2": "periastra"
      },
      "expansion": "periastron (plural periastrons or periastra)",
      "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"
        },
        {
          "kind": "other",
          "name": "English terms prefixed with peri-",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with 1 entry",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "en",
          "name": "Astronomy",
          "orig": "en:Astronomy",
          "parents": [
            "Sciences",
            "Space",
            "All topics",
            "Nature",
            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "That point of the orbit of a celestial body which is closest to the star around which the body is orbiting."
      ],
      "id": "en-periastron-en-noun-r7POJDZl",
      "links": [
        [
          "astronomy",
          "astronomy"
        ],
        [
          "orbit",
          "orbit"
        ],
        [
          "star",
          "star"
        ]
      ],
      "raw_glosses": [
        "(astronomy) That point of the orbit of a celestial body which is closest to the star around which the body is orbiting."
      ],
      "related": [
        {
          "word": "periapsis"
        }
      ],
      "topics": [
        "astronomy",
        "natural-sciences"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "/pɛɹɪˈæstɹən/"
    }
  ],
  "word": "periastron"
}

{
  "antonyms": [
    {
      "word": "apastron"
    }
  ],
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "grc",
        "3": "περί",
        "4": "",
        "5": "around"
      },
      "expansion": "Ancient Greek περί (perí, “around”)",
      "name": "der"
    }
  ],
  "etymology_text": "From Ancient Greek περί (perí, “around”) + ἄστρον (ástron, “star”).",
  "forms": [
    {
      "form": "periastrons",
      "tags": [
        "plural"
      ]
    },
    {
      "form": "periastra",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "+",
        "2": "periastra"
      },
      "expansion": "periastron (plural periastrons or periastra)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "related": [
    {
      "word": "periapsis"
    }
  ],
  "senses": [
    {
      "categories": [
        "English countable nouns",
        "English entries with incorrect language header",
        "English lemmas",
        "English nouns",
        "English nouns with irregular plurals",
        "English terms derived from Ancient Greek",
        "English terms prefixed with peri-",
        "Pages with 1 entry",
        "Pages with entries",
        "en:Astronomy"
      ],
      "glosses": [
        "That point of the orbit of a celestial body which is closest to the star around which the body is orbiting."
      ],
      "links": [
        [
          "astronomy",
          "astronomy"
        ],
        [
          "orbit",
          "orbit"
        ],
        [
          "star",
          "star"
        ]
      ],
      "raw_glosses": [
        "(astronomy) That point of the orbit of a celestial body which is closest to the star around which the body is orbiting."
      ],
      "topics": [
        "astronomy",
        "natural-sciences"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "/pɛɹɪˈæstɹən/"
    }
  ],
  "word": "periastron"
}