How to say "dinosaur" in Japanese

• 恐竜きょうりゅうCommon
  nounThe everyday word for dinosaurs, the prehistoric reptiles. Use it whenever you want to talk about dinosaurs in general, whether in conversation, schoolwork, or writing about natural history.
  かつては恐竜きょうりゅうが地球ちきゅうを支配しはいしていた。↗

  Dinosaurs used to rule the earth.
• ダイノソー
  nounA less common katakana rendering of 'dinosaur'. This is seldom the word you want for the animal itself; you may encounter it as a borrowed form in names or stylistic contexts.

Use 恐竜 for the ordinary word 'dinosaur'; 「ダイノソー」 is a much rarer katakana rendering you will seldom need, so 恐竜 is the safe choice in virtually every context.

Usage comparisons are AI-assisted and cross-checked by multiple models; for study reference only

• 恐竜きょうりゅうdinosaur
• ダイノソーdinosaur