曲線|きょくせんkyokusen[0]heiban (flat)

1. nouncurve

• SynonymカーブNeutralA loanword for a bend or turn, as on a road, or a curveball; 「曲線」 leans toward lines and contours.
• Related曲がりまがりNeutralA bend or the state of being bent, often the spot where something bends; 「曲線」 is the curved line itself.
• Related湾曲わんきょくNeutralBending into an arc, as of a curved spine; it names the bending itself, while 「曲線」 is the line or contour.
• Antonym直線ちょくせんNeutralA straight line, the opposite of the curved 「曲線」.

Use 「曲線」 for a curved line or contour, as in 「成長曲線」 or 「体の曲線」. For a bend or turn in a road, say 「カーブ」; for the bending itself, 「湾曲」; 「直線」 is the opposite, a straight line.

Usage comparisons are AI-assisted and cross-checked by multiple models; for study reference only

1. 曲まがった線せん。
2. 直線ちょくせんを含ふくむ、幾何学きかがく的てき対象たいしょうとしての線せんの総称そうしょう。「曲率きょくりつが0とは限かぎらない」という意味いみでは、直線ちょくせんを一般化いっぱんかしたもの。