"lightweight spaceship" meaning in English

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      "expansion": "lightweight spaceship (plural lightweight spaceships)",
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  "lang_code": "en",
  "pos": "noun",
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      "examples": [
        {
          "ref": "1992 August 13, David Bell, “Spaceships in Conway's Life (Part 1)”, in comp.theory.cell-automata (Usenet):",
          "text": "To begin with and to be complete, I will list the original spaceships. These are the glider, the lightweight spaceship (LWSS), middleweight spaceship (MWSS), and the heavyweight spaceship (HWSS). These were all found very soon after Life was invented by Conway.",
          "type": "quote"
        },
        {
          "ref": "1994 May 14, Paul Callahan, “Louis Howell's question of block clearing in life (simple solution)”, in comp.theory.cell-automata (Usenet):",
          "text": "It's a reaction between a glider and a lightweight spaceship spark, nondestructive to the spaceship (so it can be used in puffers):",
          "type": "quote"
        },
        {
          "ref": "2008 May 31, Dave Greene, “Life: B37/S23 - A Chaotic Universe.”, in comp.theory.cell-automata (Usenet):",
          "text": "The usual non-glider suspects from Conway's Life (lightweight, middleweight, and heavyweight spaceships) all fail here due to central 7-neighbor OFF cells.",
          "type": "quote"
        }
      ],
      "glosses": [
        "A particular orthogonal spaceship in Conway's Game of Life, and the smallest such example."
      ],
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      "raw_glosses": [
        "(cellular automata) A particular orthogonal spaceship in Conway's Game of Life, and the smallest such example."
      ],
      "related": [
        {
          "word": "middleweight spaceship"
        }
      ],
      "synonyms": [
        {
          "word": "LWSS"
        }
      ],
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  "word": "lightweight spaceship"
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      "word": "middleweight spaceship"
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          "ref": "1992 August 13, David Bell, “Spaceships in Conway's Life (Part 1)”, in comp.theory.cell-automata (Usenet):",
          "text": "To begin with and to be complete, I will list the original spaceships. These are the glider, the lightweight spaceship (LWSS), middleweight spaceship (MWSS), and the heavyweight spaceship (HWSS). These were all found very soon after Life was invented by Conway.",
          "type": "quote"
        },
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          "ref": "1994 May 14, Paul Callahan, “Louis Howell's question of block clearing in life (simple solution)”, in comp.theory.cell-automata (Usenet):",
          "text": "It's a reaction between a glider and a lightweight spaceship spark, nondestructive to the spaceship (so it can be used in puffers):",
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        },
        {
          "ref": "2008 May 31, Dave Greene, “Life: B37/S23 - A Chaotic Universe.”, in comp.theory.cell-automata (Usenet):",
          "text": "The usual non-glider suspects from Conway's Life (lightweight, middleweight, and heavyweight spaceships) all fail here due to central 7-neighbor OFF cells.",
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        "A particular orthogonal spaceship in Conway's Game of Life, and the smallest such example."
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      "raw_glosses": [
        "(cellular automata) A particular orthogonal spaceship in Conway's Game of Life, and the smallest such example."
      ],
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        {
          "word": "LWSS"
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