also: なみせん
noun
wavy line; tilde
Refers to a wavy line or tilde (~) used in writing, drawing, or as a symbol.
書類の下に波線を引いてください。
Please draw a wavy line under the document.
この記号は波線と呼ばれています。
This symbol is called a tilde.
Mixed kanji-kana spelling, explicitly showing the reading なみせん.
Compound of 波 (wave) and 線 (line). The reading はせん uses the on'yomi of both characters, while なみせん uses the kun'yomi for 波 and on'yomi for 線.