(こうさせん)

こうさせん
noun
intersecting lines; crossing lines
1. intersecting line; crossing line
A line that crosses or intersects another line or path. Used in geometry and technical drawing for lines that share a common point with another line, and more broadly for any line that cuts across something — for example, lines drawn through text or crosshatched patterns in illustrations.
地図(ちず)交差線(こうさせん)()く。
To draw intersecting lines on a map.
()1(いち)の2(ほん)交差線(こうさせん)直角(ちょっかく)(まじ)わっている。
The two intersecting lines in Figure 1 cross at right angles.
()(くら)部分(ぶぶん)は、(ほそ)交差線(こうさせん)(かさ)ねて表現(ひょうげん)されている。
The dark sections of the picture are rendered with overlapping thin crosshatching lines.
設計図(せっけいず)道路(どうろ)交差線(こうさせん)確認(かくにん)してから、信号(しんごう)位置(いち)()めた。
After checking the intersecting lines of the roads on the blueprint, we decided where to place the traffic lights.

Composed of 交差(こうさ) (crossing, intersection) and (せん) (line). A somewhat technical term used in mathematics, drafting, drawing, and map-reading contexts for lines that cross one another.

USAGE:
Most often encountered in technical or illustrative contexts — geometry diagrams, technical drawings, architectural blueprints, and art techniques (e.g., crosshatching in pen-and-ink drawing). In casual speech about roads or paths that cross, speakers are more likely to use 交差(こうさ)する as a verb or to refer to the location as a 交差点(こうさてん) (intersection).

COMMON COLLOCATIONS:

  • 交差線(こうさせん)()く / ()く: to draw intersecting lines
  • 交差線(こうさせん)(かさ)なる: for intersecting lines to overlap
  • (ほそ)交差線(こうさせん): thin crossing lines (e.g., in crosshatching)
  • 直角(ちょっかく)交差線(こうさせん): perpendicular intersecting lines

SIMILAR WORDS:

  • 交差点(こうさてん): intersection (point) — the point where lines or roads meet; for traffic intersections this is the standard term
  • 交差(こうさ): crossing; intersection — the abstract noun/verb; 交差(こうさ)する is the verb
  • 直線(ちょくせん): straight line — the general term, which becomes a 交差線(こうさせん) when it intersects another
  • 斜線(しゃせん): diagonal / oblique line — a line drawn at an angle; often used with 交差線(こうさせん) in crosshatched drawings
  • 平行線(へいこうせん): parallel lines — the opposite case, where lines do not intersect