Standard Lemma guide

planetoid

noun · 6 senses · updated from the 2026-07-25 local source snapshot

Definitions and examples are grouped by meaning. Pronunciation, history, word forms, translations, descendants, synonyms, antonyms, derived terms, and related words appear whenever the source provides them.

Sound

Pronunciation

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1

noun

Meaning 1

An asteroid of any size

Definition source: English Wiktionary via Wiktextract

Usage: dated

Topics: astronomy, natural-sciences

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

2

noun

Meaning 2

An asteroid-like body in an orbit beyond the asteroid belt, such as a centaur or Kuiper belt object

Definition source: English Wiktionary via Wiktextract

Usage: dated

Topics: astronomy, natural-sciences

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

3

noun

Meaning 3

A larger, planetary, body in orbit around the Sun, such as Vesta or (candidate) dwarf planets such Eris or Sedna

Definition source: English Wiktionary via Wiktextract

Topics: astronomy, natural-sciences

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

4

noun

Meaning 4

Any planetary body, including classical planets and moons: a planetary-mass object

Definition source: English Wiktionary via Wiktextract

Topics: astronomy, natural-sciences

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

5

noun

Meaning 5

A dwarf planet

Definition source: English Wiktionary via Wiktextract

Topics: astronomy, natural-sciences

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

6

noun

Meaning 6

any of numerous small celestial bodies that move around the sun

Definition source: Princeton WordNet 3.0

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: minor planet

Antonyms: none provided

Broader terms: celestial body, heavenly body

Narrower terms: asteroid, Kuiper belt object, KBO, Quaoar, Sedna

History

Etymology

Etymology tree English planet Ancient Greek -ο- (-o-)der. Latin -o- Proto-Indo-European *weyd- Proto-Indo-European *-os Proto-Indo-European *wéydos Proto-Hellenic *wéidos Ancient Greek εἶδος (eîdos) Proto-Indo-European *-os Proto-Indo-European *-ēs Ancient Greek -ης (-ēs) Ancient Greek -ειδής (-eidḗs) Latin -oīdēslbor. English -oid English planetoid From planet + -oid.

Across languages

Translations

19 source translations are retained for this English entry.

  • Chinese Mandarin: 小行星 (xiǎo xíngxīng) — any of several larger astral bodies
  • French: planétoïde — any of several larger astral bodies
  • German: Planetoid — any of several larger astral bodies
  • Hindi: क्षुद्रग्रह (kṣudragrah) — any of several larger astral bodies
  • Ido: asteroido — any of several larger astral bodies
  • Irish: mionphláinéad — any of several larger astral bodies
  • Italian: asteroide — any of several larger astral bodies
  • Italian: pianetino — any of several larger astral bodies
  • Italian: planetoide — any of several larger astral bodies
  • Japanese: 小惑星 (shōwakusei) — any of several larger astral bodies
  • Macedonian: планетои́д (planetoíd) — any of several larger astral bodies
  • Macedonian: мала плане́та (mala planéta) — any of several larger astral bodies
  • Manx: planaideen — any of several larger astral bodies
  • Polish: planetoida — any of several larger astral bodies
  • Portuguese: planetoide — any of several larger astral bodies
  • Romanian: planetoid — any of several larger astral bodies
  • Russian: плането́ид (planetóid) — any of several larger astral bodies
  • Russian: ма́лая плане́та (málaja planéta) — any of several larger astral bodies
  • Tagalog: malabuntala — any of several larger astral bodies