三さん次じ

noun which may take the genitive case particle 'no', noun

third; third stage; third round

General ordinal use for a third stage, round, or level. Often appears in compounds such as 三次選考 or 三次募集 rather than as a very broad standalone word.

• 彼かれは三さん次じ選せん考こうまで進すすんだ。

  He made it to the third round of selection.

noun-modifying (irregular)

tertiary; third-level

Used in classification terms where English often says 'tertiary,' especially in established compounds such as 三次産業. More technical than simply saying 'the third one.'

• 観かん光こう業ぎょうは三さん次じ産さん業ぎょうに含ふくまれる。

  Tourism is included in the tertiary sector.

noun-modifying (irregular)

cubic; third-order; third-degree

Mathematical use for degree or order three, as in 三次方程式 'cubic equation' and 三次関数 'cubic function.'

• この三さん次じ方ほう程てい式しきを解といてください。

  Please solve this cubic equation.

• 授じゅ業ぎょうで三さん次じ関かん数すうのグラフを描えがいた。

  In class, we drew the graph of a cubic function.