🌍 English Origins #90
Greek
dinosaur
/ˈdaɪnəˌsɔːr/
공룡
Greek deinos ("terrible") + sauros ("lizard") → dinosaur.
✍️ ONGO · 2026-06-06 · 5 min read
01

Origin Story

Era
19th-century Britain, 1841

The word dinosaur is, in fact, a relatively recent invention. In the early 19th century, people were astonished to dig up enormous bones and teeth from the ground. What kind of creature could they belong to? In 1841, the British anatomist Richard Owen gave these giant extinct creatures a name. Drawing on Greek, he combined deinos, meaning "terrible" or "fearsome," with sauros, meaning "lizard," to coin dinosaur — the "terrible lizard." It was a name that captured the awe people felt before those fossils. So this familiar word, known even to small children, turns out to be a scholar's coinage less than two centuries old.

Strictly speaking, dinosaurs were not lizards at all. But to a 19th-century scholar's eye they looked like giant lizards, so the name stuck — and it has remained fixed ever since.

📚 Sources
  • Online Etymology Dictionary
    dinosaur (n.): 1841, coined in Modern Latin (Dinosaurus) by Sir Richard Owen, from Greek deinos "terrible" + sauros "lizard"
  • Oxford English Dictionary
    dinosaur: from Greek deinos "terrible" and sauros "lizard," coined by Richard Owen in 1841
  • Merriam-Webster Dictionary
    New Latin Dinosauria, from Greek deinos terrifying + sauros lizard
02

Word Evolution

1
Ancient Greek
deinos + sauros
terrible + lizard
2
Modern Latin, 1841
Dinosaurus
the scientific name coined by Owen
3
Modern English
dinosaur
dinosaur
03

Words from the Same Root

dinosaur (비유)
Dinosaur (figurative) — an outdated person or thing, a metaphor drawn from the image of the extinct giants.
Tyrannosaurus
Tyrannosaurus — another dinosaur name built on sauros ("lizard").
dinosaur eggs
Dinosaur eggs — a common compound phrase using dinosaur.
04

Memory Hook

Dinosaur is "deinos (terrible) + sauros (lizard)." Remember it as "the terrible lizard."

""To creatures gone for hundreds of millions of years, a 19th-century scholar gave the gift of a name: terrible lizard.""

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