Japanese

しがいせん
Meaning: ultraviolet rays; UV
Part of Speech: Noun

Listen to pronunciation

Handwriting

紫
外
線

Example sentences

Since the UV rays are strong in summer, you should apply sunscreen.
標本に紫外線が照射された。
Ultraviolet rays were irradiated onto the specimen.
この物質は紫外線を当てると緑色の蛍光を発する。
This substance emits green fluorescence when exposed to ultraviolet rays.
蛍石は、紫外線を照射すると蛍光を発する鉱物です。
Fluorite is a mineral that emits fluorescence when irradiated with ultraviolet light.

Usage Notes

A scientific term for invisible light with wavelengths shorter than visible violet light.

Sottaku

About Sottaku

Sottaku is an app for learning Chinese, Japanese, Korean, English, Spanish, French, German, and Italian with a strong focus on SRS. It includes automatic flashcard creation for hundreds of thousands of words, grammar breakdowns in example sentences, language-specific study packs where available, adaptive quizzes, mobile apps, a browser extension, and community features. Give it a try now! All learning content is free with no limits on flashcards or study time.

Sottaku is built to match the habits of successful learners. By using Sottaku, you will naturally learn in the most efficient way possible, as proven by countless success stories in the language learning community.

Free Forever

Access all grammar guides, quizzes, and flashcards without paying a cent. Quality education should be accessible to everyone.

Smart SRS System

Our flashcard system uses the FSRS algorithm (also used in Anki) to optimize your review schedule and maximize retention.

Comprehensive Content

From hanzi, kana, hangul, and European vocabulary basics to grammar and reading practice where available, we have lessons for every level. Practice with quizzes tailored to your skill.

Community Chat

Ask level-appropriate questions and get help from the community. Learn together with fellow learners across all 8 supported languages.