紫外線 (しがいせん)ultraviolet rays; ultraviolet radiation

紫外線, its kanji, and other words that share them.Open this graph

Kanji in 紫外線

紫むらさきpurple; violet
紫色むらさきいろpurple; violet
紫紺しこんbluish purple
紫綬褒章しじゅほうしょうMedal of Honor with Purple Ribbon (awarded for scholarly or artistic achievement)
九紫きゅうしninth of nine traditional astrological signs (corresponding to Mars and south)
京紫きょうむらさきsomewhat reddish purple
内紫うちむらさきpurple Washington clam (Saxidomus purpurata)
千紫万紅せんしばんこうmultitude of colors; multitude of colours
外交がいこうdiplomacy
外務省がいむしょうMinistry of Foreign Affairs
外国がいこくforeign country
外国人がいこくじんforeigner; foreign citizen
外相がいしょうForeign Minister
海外かいがいforeign; abroad
外そとoutside; exterior
内外ないがいinside and outside; interior and exterior
路線ろせんroute (bus, train, air, etc.); line
打線だせんbatting lineup (line-up)

See how 紫外線 connects to the rest of Japanese.