The word(s) "elucidativa" appears 4 time(s) in 4 verse(s) in Quran in Portuguese (Prof. Samir El-Hayek) translation.

(1) Pelo que Nos vingamos deles. E, em verdade, ambas (as cidades) são ainda elucidativas.

(سورة الحجر, Al-Hijr, Chapter #15, Verse #79)
(Arabic, Transliteration, Urdu (Ahmed Ali), Urdu (Jalandhry), Farsi, Yusuf Ali, Shakir, Picthal, Mohsin Khan, French, Spanish, Indonesian, Malay, German, Bosnian, Russian, Dutch, Italian, Portuguese, Tafsir - Jalal ad-Din, Tafsir - King Fahad Quran Complex)

(2) Bem sabemos o que dizem: Foi um ser humano que lho ensinou (o Alcorão a Mohammad). Porém, o idioma daquele aquem eludem tê-lo ensinado é o persa, enquanto que a deste (Alcorão) é a elucidativa língua árabe.

(سورة النحل, An-Nahl, Chapter #16, Verse #103)
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(3) Em elucidativa língua árabe.

(سورة الشعراء, Ash-Shu'araa, Chapter #26, Verse #195)
(Arabic, Transliteration, Urdu (Ahmed Ali), Urdu (Jalandhry), Farsi, Yusuf Ali, Shakir, Picthal, Mohsin Khan, French, Spanish, Indonesian, Malay, German, Bosnian, Russian, Dutch, Italian, Portuguese, Tafsir - Jalal ad-Din, Tafsir - King Fahad Quran Complex)

(4) Encomenda-te, pois, a Deus, porque segues a verdade elucidativa.

(سورة النمل, An-Naml, Chapter #27, Verse #79)
(Arabic, Transliteration, Urdu (Ahmed Ali), Urdu (Jalandhry), Farsi, Yusuf Ali, Shakir, Picthal, Mohsin Khan, French, Spanish, Indonesian, Malay, German, Bosnian, Russian, Dutch, Italian, Portuguese, Tafsir - Jalal ad-Din, Tafsir - King Fahad Quran Complex)