"pupillometer" meaning in English

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      "expansion": "Etymology tree\nEnglish pupil\nAncient Greek -ο- (-o-)der.\nLatin -o-bor.\nEnglish -o-\nEnglish -meter\nEnglish pupillometer\n[Appendix:Glossary#loanword|Borrowed]] from\", \"terms\" : [ { \"id\" : \"connective\", \"children\" : [ { \"keyword_abbrev\" : \"der.\", \"keyword_label\" : \"Derived from\", \"terms\" : [ { \"id\" : \"connective\", \"children\" : [ ], \"status\" : \"missing\", \"lang_name\" : \"Ancient Greek\", \"term\" : \"-ο-\", \"lang\" : \"grc\" } ], \"keyword\" : \"derived\" } ], \"status\" : \"ok\", \"lang_name\" : \"Latin\", \"term\" : \"-o-\", \"lang\" : \"la\" } ], \"keyword\" : \"bor\" } ], \"lang_name\" : \"English\", \"term\" : \"-o-\", \"status\" : \"ok\", \"lang\" : \"en\" }, { \"children\" : [ ], \"lang_name\" : \"English\", \"term\" : \"-meter\", \"status\" : \"missing\", \"lang\" : \"en\" } ], \"keyword_label\" : \"From\", \"is_group\" : true, \"keyword\" : \"affix\" } ], \"lang_name\" : \"English\", \"term\" : \"pupillometer\", \"status\" : \"ok\", \"lang\" : \"en\" }\" data-lang=\"en\" data-title=\"pupillometer\">\nFrom pupil + -o- + -meter.",
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  "etymology_text": "Etymology tree\nEnglish pupil\nAncient Greek -ο- (-o-)der.\nLatin -o-bor.\nEnglish -o-\nEnglish -meter\nEnglish pupillometer\nFrom pupil + -o- + -meter.",
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        "A device used to measure the diameter of the pupil of the eye."
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          "diameter",
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          "eye",
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