actinoid.
actinide
Meaning & usage
actinide
Where this word comes from
Etymology tree Ancient Greek ᾰ̓κτῑ́ς (ăktī́s)der. English actino- English actin- 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 Proto-Hellenic *-ēs Ancient Greek -ης (-ēs) Ancient Greek -ειδής (-eidḗs) Latin -oīdēslbor. English -oid English actinoid From actin- + -oid.
Having the form of rays; radiated, as in the species of the family Actiniidae.
Where this word comes from
Etymology tree Ancient Greek ᾰ̓κτῑ́ς (ăktī́s)der. English actino- English actin- 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 Proto-Hellenic *-ēs Ancient Greek -ης (-ēs) Ancient Greek -ειδής (-eidḗs) Latin -oīdēslbor. English -oid English actinoid From actin- + -oid.
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Definitions, grammatical labels, IPA, etymology and examples: Wiktionary contributors, extracted by Kaikki / Wiktextract. Adapted under CC BY-SA 4.0. Selected fields and authored examples are shown; third-party quotations and audio are omitted. See contributor history.
Last enriched 2026-09-10. Definitions are in English. Romanizations are shown when supplied by the source; syllable estimates are omitted for unsupported scripts.