also: ほそせん
thin line; fine line
Refers to a physically thin line, such as in drawing, design, or technical contexts.
In this drawing, the thin lines represent auxiliary lines.
Please draw the outline with a fine line.
Standard kanji spelling; the reading さいせん is the most common.
Alternate reading; less common than さいせん.
Compound of 細 (さい, 'thin') and 線 (せん, 'line'). The reading ほそせん uses the kun'yomi of 細.