Allah Almighty did mention dinosaurs in the Noble Quran. While the word "dinosaurs" is a modern word that refers to the gigantic animals that existed perhaps millions of years ago, Allah Almighty referred to all created "beasts" as "dabbah". A "dabbah" in the Noble Quran consists of all animals, including the dinosaurs.
"Behold! in the creation of the heavens and the earth; in the alternation of the night and the day; in the sailing of the ships through the ocean for the profit of mankind; in the rain which God Sends down from the skies, and the life which He gives therewith to an earth that is dead; in the beasts of all kinds that He scatters through the earth; in the change of the winds, and the clouds which they Trail like their slaves between the sky and the earth;- (Here) indeed are Signs for a people that are wise. (The Noble Quran, 2:164)"
"He created the heavens without any pillars that ye can see; He set on the earth mountains standing firm, lest it should shake with you; and He scattered through it beasts of all kinds. We send down rain from the sky, and produce on the earth every kind of noble creature, in pairs. (The Noble Quran, 31:10)"
Notice in Noble Verse 31:10, Allah Almighty said that He created the mountains to prevent the earth from shaking (which had been scientifically proven to be true. and then after that He, the Almighty, created beasts and scattered them throughout the land. These first beasts that were created before mankind may be what we call today "dinosaurs".