Explore Words Kanji Grammar Guides

Copyright © 2026 Kotomora. All Rights Reserved.

Get the Kotomora apps for iOS and Android.

Explore Words Kanji Grammar Guides About Support Privacy

Copyright © 2026 Kotomora. All Rights Reserved.

トリウム系列 (toriumukeiretsu) Japanese meaning | Kotomora

トリウム系けい列れつ

ト

リ

ウ

ム

け

い

れ

つ

Meanings

1

thorium series

In nuclear chemistry, the radioactive decay chain starting from thorium-232 and ending with lead-208.

トリウム系けい列れつは、天てん然ねんに存そん在ざいする放ほう射

しゃ

性せい

壊かい

変へん

系けい

列れつ

の

一ひと

つ

です

。

The thorium series is one of the naturally occurring radioactive decay series.

Kanji

系lineage, system
列file, row, rank

Related words

ウラン系けい列れつ
The uranium series starts from uranium-238, while the thorium series starts from thorium-232.
アクチニウム系けい列れつ
The actinium series starts from uranium-235, another natural decay chain.

Built from

トリウム+系けい列れつ

Etymology

Compound of トリウム (thorium) and 系列 (series, lineage). The term is a direct calque from English 'thorium series', used in nuclear chemistry.