fossil
preserved remains of ancient life
The hard remains or mark of a very old plant or animal, kept in rock for a long time.
a fossil of [an animal/plant] in [rock/place]
- The museum has a huge fossil of a Tyrannosaurus rex in its main hall.
- Scientists used tiny fish fossils to learn about the climate millions of years ago.
- We found a fossil leaf perfectly preserved in the slab of shale.
- The fossil was embedded in the rock, so they had to remove it very carefully.
- These footprints are actually fossils made by early reptiles.
- My son loves to look at dinosaur fossils.
- They found a fossil of a big fish in the mountain.
- This rock has a small shell fossil inside it.
- We saw many plant fossils in the science museum.
very old-fashioned person
A joking or rude word for a person who is very old or does not want to change old ideas.
call [someone] an old fossil
- He’s such an old fossil, still refusing to use email.
- Don’t be a fossil—try something new for once.
- They called the former boss a fossil because he blocked every modern idea.
- I feel like a fossil when my kids talk about new apps.
- In that company, only fossils still believe people should never work from home.
- My grandpa jokes that he is a fossil because he hates smartphones.
- Stop acting like a fossil and listen to new ideas.
- Some students think the old teacher is a fossil.
relating to fossils or fossil fuels
About fossils, or about fuels like coal, oil, and gas that come from very old plants and animals.
fossil [fuel/remains/record/species]
- Many governments are trying to reduce their use of fossil fuels.
- The fossil record shows several mass extinction events.
- Fossil remains of early humans were discovered in the cave.
- Burning fossil fuels releases large amounts of carbon dioxide.
- She specializes in fossil plants from the Jurassic period.
- Coal and oil are fossil fuels.
- We must use less fossil fuel to protect the planet.
- Scientists study the fossil record to learn about the past.
linguistic form preserved from earlier stage
A word or part of grammar that still exists in a few fixed phrases, but is not used normally in the language anymore.
a fossil in [the language/a phrase]
- In the phrase "kith and kin", the word "kith" is a fossil no longer used elsewhere.
- Some irregular plural forms in English can be seen as linguistic fossils.
- The teacher explained that "aught" in old expressions is a fossil from an earlier number system.
- This construction is a grammatical fossil that survives only in a few legal phrases.
- Linguists study fossils in language to understand how it has changed over time.
- The word "kith" is a fossil in English.
- Some very old words live on as fossils in set phrases.
- Linguists call this strange old form a fossil.
extremely old-fashioned or outdated
Very old-fashioned and not open to new ideas or ways of doing things.
fossil [attitudes/ideas/mindset]
- The company’s fossil attitudes toward women are finally starting to change.
- Some politicians still defend fossil social ideas from the 1950s.
- Universities need to move away from fossil teaching methods that ignore technology.
- His fossil mindset makes it hard for him to work in a fast-changing industry.
- They challenged the fossil views that had guided the organization for decades.
- The school has some fossil rules about clothes.
- Her parents have fossil ideas about dating.
- These fossil views do not fit modern life.
- Base: fossil
- Base: fossil
- Plural: fossils
fossil fuel
1coal, oil, or natural gas
Fuel such as coal, oil, or gas that comes from very old plants and animals deep in the ground.
- Burning fossil fuel is a major source of greenhouse gas emissions.
- The country plans to phase out fossil fuel power stations by 2040.
fossil fuels
1group of non-renewable fuels
Coal, oil, and gas together, when we talk about them as non-renewable energy sources.
- Many scientists say we must quickly cut our use of fossil fuels.
- Renewable energy is becoming cheaper than fossil fuels in many countries.
living fossil
1unchanged species from ancient times
An animal or plant that is alive today but looks almost the same as its very old fossil relatives.
- The coelacanth is often called a living fossil.
- Some scientists dislike the term "living fossil" because all species continue to evolve.
old fossil
1very old and stuck-in-the-past person
A joking or rude way to talk about someone who is very old and does not like new things.
- He’s just an old fossil who refuses to learn anything new.
- My kids call me an old fossil when I complain about social media.
the fossil record
1all fossils showing life’s history
All the fossils that have been found, seen together as information about how life changed over time.
- The fossil record provides strong evidence for evolution.
- Gaps in the fossil record make some periods of Earth’s history hard to study.