"posterior chambers" meaning in English

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  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
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      "form_of": [
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          "word": "posterior chamber"
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      "glosses": [
        "plural of posterior chamber"
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      "id": "en-posterior_chambers-en-noun-pAjQ~ovx",
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  "word": "posterior chambers"
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      "expansion": "posterior chambers",
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  "lang_code": "en",
  "pos": "noun",
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      "form_of": [
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          "word": "posterior chamber"
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      "glosses": [
        "plural of posterior chamber"
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  "word": "posterior chambers"
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