radioactinium

ra·di·o·ac·tin·i·um

R r

Transcription

- US Pronunciation
- US IPA
- [rey-dee-oh-ak-tin-ee-uh m]
- /ˌreɪ di oʊ ækˈtɪn i əm/

- US Pronunciation
- US IPA
- [rey-dee-oh-ak-tin-ee-uh m]
- /ˌreɪ di oʊ ækˈtɪn i əm/

Definition of radioactinium word

noun radioactinium the radioactive isotope of thorium having a mass number 227 and a half-life of 18.8 days. Symbol: RdAc, Th 227. 1

Just one definition for radioactinium

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Origin of radioactinium

First appearance:

before 1905

One of the 15% newest English words

First recorded in 1905-10; radio- + actinium

Historical Comparancy

Parts of speech for Radioactinium

noun

adjective

verb

adverb

pronoun

preposition

conjunction

determiner

exclamation

Full grammatical hierarchy of Radioactinium

radioactinium popularity

This term is known only to a narrow circle of people with rare knowledge. Only 29% of English native speakers know the meaning of this word.

According to our data about 62% of words is more used. This is a rare but used term. It occurs in the pages of specialized literature and in the speech of educated people.

radioactinium usage trend in Literature

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