meteoroid
C2Formal, Scientific
Definition
Meaning
A small rocky or metallic body in outer space, significantly smaller than an asteroid.
A natural object originating in the solar system that travels through space. It is considered a meteoroid until it enters a planetary atmosphere, at which point it becomes a meteor (a 'shooting star'). If any part of it survives atmospheric entry and impacts the ground, it is then termed a meteorite.
Linguistics
Semantic Notes
The term belongs to a precise scientific taxonomy: meteoroid (in space) -> meteor (in atmosphere) -> meteorite (on ground). It is often confused with the more general term 'asteroid', which is larger.
Dialectal Variation
British vs American Usage
Differences
No significant differences in meaning, spelling, or usage.
Connotations
Identical scientific connotations in both varieties.
Frequency
Equally low-frequency in both dialects, confined to academic and popular science contexts.
Vocabulary
Collocations
Grammar
Valency Patterns
The meteoroid [verb: entered, collided with, became] ...A meteoroid [prepositional phrase: from the asteroid belt, in deep space] ...Vocabulary
Synonyms
Neutral
Weak
Vocabulary
Antonyms
Usage
Context Usage
Business
Virtually never used.
Academic
Core term in astronomy, planetary science, and aerospace engineering.
Everyday
Rare; mostly encountered in news reports about potential impacts or popular science.
Technical
Precise term for risk assessment in spacecraft design and orbital mechanics.
Examples
By Part of Speech
adjective
British English
- meteoroid bombardment
- meteoroid flux measurements
American English
- meteoroid impact risk
- meteoroid detection system
Examples
By CEFR Level
- Scientists track meteoroids to predict if they will hit Earth.
- A meteoroid is a piece of rock flying through space.
- The spacecraft's shield was designed to withstand impacts from small meteoroids.
- Most meteoroids that become visible meteors are no larger than a grain of sand.
- The mission's objective was to collect data on the composition and velocity of meteoroids in the near-Earth environment.
- Analysing the orbital trajectory of the meteoroid allowed researchers to pinpoint its likely origin in the main asteroid belt.
Learning
Memory Aids
Mnemonic
Think of the sequence: OID in space, OR in the air, ITE on the ground. MeteorOID -> meteOR -> meteorITE.
Conceptual Metaphor
A SPACECRAFT/TRAVELLER (e.g., 'The meteoroid journeyed for millions of years before meeting its end in our atmosphere.')
Watch out
Common Pitfalls
Translation Traps (for Russian speakers)
- The Russian word 'метеороид' is a direct cognate and is used identically. The main trap is confusing it with 'метеорит' (meteorite) or 'метеор' (meteor).
Common Mistakes
- Using 'meteoroid' to refer to the bright streak in the sky (which is a meteor).
- Misspelling as 'meteroid' or 'meteorid'.
- Using it as a synonym for 'asteroid'.
Practice
Quiz
What is the correct term for a small rocky body while it is in interplanetary space?
FAQ
Frequently Asked Questions
A meteoroid is in space. When it burns up in the atmosphere, creating a streak of light, it's a meteor. If a piece survives and lands on Earth, it's a meteorite.
They range from tiny dust particles to objects about one metre in diameter. Anything larger is generally classified as an asteroid.
Yes, even a small meteoroid travelling at high speed can cause significant damage to satellites and spacecraft due to its kinetic energy.
Most originate from collisions between asteroids or from material ejected from comets as they orbit near the Sun.