Standard Lemma guide

radiolarian

noun · 2 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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  • Received-Pronunciation: /ˌɹeɪ.di.ə(ʊ)ˈlɛəɹi.ən/
  • General-American: /ˌɹeɪ.di.oʊˈlɛɹi.ən/
  • General-American: /ˌɹeɪ.di.əˈ-/
  • rhymes with -ɛəɹiən

1

noun

Meaning 1

Any of many marine amoeboid protozoa, of subclass Radiolaria, having filamentous pseudopodia; they have intricate silica skeletons.

Definition source: English Wiktionary via Wiktextract

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

2

noun

Meaning 2

protozoa with amoeba-like bodies and radiating filamentous pseudopods

Definition source: Princeton WordNet 3.0

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

Broader terms: actinopod

History

Etymology

Etymology tree Translingual Radiolaria Proto-Indo-European *-nós Proto-Italic *-nos Latin -nus Latin -ānus Old French -ainder. Middle English -an English -an English radiolarian From Translingual Radiolaria + English -an.

Across languages

Translations

13 source translations are retained for this English entry.

  • Afrikaans: radiolarieë — marine protozoa
  • Afrikaans: straaldiertjie — marine protozoa
  • Catalan: radiolari — marine protozoa
  • Finnish: säde-eläin — marine protozoa
  • French: radiolaire — marine protozoa
  • German: Strahlentierchen — marine protozoa
  • German: Radiolarie — marine protozoa
  • Hungarian: sugárállatka — marine protozoa
  • Italian: radiolario — marine protozoa
  • Polish: promienica — marine protozoa
  • Polish: radiolaria — marine protozoa
  • Portuguese: radiolário — marine protozoa
  • Spanish: radiolario — marine protozoa