三さん角かく波なみ

noun

choppy sea; chopping waves

Describes a sea surface with short, steep, triangular-shaped waves, often caused by wind against current.

• 台たい風ふうの後あと、港みなとの外そとは三さん角かく波なみが立たっていた。

  After the typhoon, there were choppy waves outside the harbor.

noun

triangle wave

Only with reading さんかくは

Technical term in physics and signal processing for a periodic waveform with a triangular shape.

• 三さん角かく波はは正せい弦げん波はや矩く形けい波はと並ならんで基き本ほん的てきな波は形けいの一ひとつです。

  The triangle wave is one of the fundamental waveforms along with sine and square waves.