planetoid: meaning, definition, pronunciation and examples
LowTechnical/Scientific
Quick answer
What does “planetoid” mean?
A small celestial body that orbits the Sun, similar to a planet but smaller.
Audio
Pronunciation
Definition
Meaning and Definition
A small celestial body that orbits the Sun, similar to a planet but smaller; often used interchangeably with 'asteroid'.
Any small, planet-like body in space, including those in the asteroid belt, Kuiper belt, or other planetary systems. In broader usage, it can refer to a dwarf planet or a minor planet.
Dialectal Variation
British vs American Usage
Differences
No significant differences in meaning or usage. Both varieties use the term in identical technical contexts.
Connotations
Neutral scientific term in both varieties.
Frequency
Equally low frequency in both UK and US English, confined to scientific discourse.
Grammar
How to Use “planetoid” in a Sentence
[planetoid] + [orbits/rotates/approaches] + [object][scientists/astronomers] + [observe/classify/study] + [planetoid]Vocabulary
Collocations
Examples
Examples of “planetoid” in a Sentence
adjective
British English
- The planetoid composition was analysed.
- Planetoid research is a growing field.
American English
- The planetoid composition was analyzed.
- Planetoid research is a growing field.
Usage
Meaning in Context
Business
Virtually never used.
Academic
Used in astronomy, astrophysics, and planetary science papers and textbooks.
Everyday
Extremely rare; would only appear in popular science articles or documentaries.
Technical
Primary context; used to classify and discuss small planetary bodies.
Vocabulary
Synonyms of “planetoid”
Vocabulary
Antonyms of “planetoid”
Watch out
Common Mistakes When Using “planetoid”
- Using 'planetoid' to refer to moons or comets.
- Pronouncing it as /pleɪˈnɛt.ɔɪd/ (incorrect stress).
FAQ
Frequently Asked Questions
Often yes, especially for bodies in the asteroid belt. 'Planetoid' is a broader term that can include larger bodies like dwarf planets, while 'asteroid' typically refers to smaller rocky bodies.
No, 'planetoid' is exclusively a noun (and occasionally used attributively as an adjective, e.g., 'planetoid body').
A planet is a large celestial body that has cleared its orbit of other debris. A planetoid is much smaller and has not cleared its orbit.
No, it is a low-frequency, technical term used almost exclusively in astronomy and related sciences.
A small celestial body that orbits the Sun, similar to a planet but smaller.
Planetoid is usually technical/scientific in register.
Planetoid: in British English it is pronounced /ˈplæn.ɪ.tɔɪd/, and in American English it is pronounced /ˈplæn.ə.tɔɪd/. Tap the audio buttons above to hear it.
Phrases
Idioms & Phrases
- “None”
Learning
Memory Aids
Mnemonic
Think: PLANET + 'oid' (meaning 'resembling' or 'like'). A planetoid is like a small planet.
Conceptual Metaphor
A planetoid is a 'baby planet' or a 'planetary building block'.
Practice
Quiz
In which field is the term 'planetoid' primarily used?