"ἀκρογωνιαῖος" meaning in Grec ancien

{
  "categories": [
    {
      "kind": "other",
      "name": "Adjectifs en grec ancien",
      "parents": [],
      "source": "w"
    },
    {
      "kind": "other",
      "name": "Compositions en grec ancien",
      "parents": [],
      "source": "w"
    },
    {
      "kind": "other",
      "name": "Grec ancien",
      "orig": "grec ancien",
      "parents": [],
      "source": "w"
    }
  ],
  "derived": [
    {
      "lang": "Grec",
      "lang_code": "el",
      "word": "ακρογωνιαίος"
    }
  ],
  "etymology_texts": [
    "Motcomposé de ἄκρος, ákros (« extrême »), γωνία, gônía (« angle, coin ») et -ος, -os."
  ],
  "lang": "Grec ancien",
  "lang_code": "grc",
  "pos": "adj",
  "pos_title": "Adjectif",
  "raw_tags": [
    "ἀκρογωνιαῖος, akrogoniaíos"
  ],
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Exemples en grec ancien",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Lexique en grec ancien de l’architecture",
          "parents": [],
          "source": "w"
        }
      ],
      "examples": [
        {
          "text": "ἀκρογωνιαῖος λίθος.",
          "translation": "pierre angulaire."
        }
      ],
      "glosses": [
        "Angulaire."
      ],
      "id": "fr-ἀκρογωνιαῖος-grc-adj-IHbfEHF0",
      "topics": [
        "architecture"
      ]
    }
  ],
  "synonyms": [
    {
      "raw_tags": [
        "Plus rare"
      ],
      "word": "γωνιαῖος"
    }
  ],
  "word": "ἀκρογωνιαῖος"
}

{
  "categories": [
    "Adjectifs en grec ancien",
    "Compositions en grec ancien",
    "grec ancien"
  ],
  "derived": [
    {
      "lang": "Grec",
      "lang_code": "el",
      "word": "ακρογωνιαίος"
    }
  ],
  "etymology_texts": [
    "Motcomposé de ἄκρος, ákros (« extrême »), γωνία, gônía (« angle, coin ») et -ος, -os."
  ],
  "lang": "Grec ancien",
  "lang_code": "grc",
  "pos": "adj",
  "pos_title": "Adjectif",
  "raw_tags": [
    "ἀκρογωνιαῖος, akrogoniaíos"
  ],
  "senses": [
    {
      "categories": [
        "Exemples en grec ancien",
        "Lexique en grec ancien de l’architecture"
      ],
      "examples": [
        {
          "text": "ἀκρογωνιαῖος λίθος.",
          "translation": "pierre angulaire."
        }
      ],
      "glosses": [
        "Angulaire."
      ],
      "topics": [
        "architecture"
      ]
    }
  ],
  "synonyms": [
    {
      "raw_tags": [
        "Plus rare"
      ],
      "word": "γωνιαῖος"
    }
  ],
  "word": "ἀκρογωνιαῖος"
}