noun
trick; contrivance; clever mechanism
Refers to a mechanical trick or clever device, often with a sense of ingenuity. In modern Japanese, からくり is far more common for this meaning; 機巧 is a rare, somewhat literary or technical synonym.
この時計は精巧な機巧で動いている。
This clock runs by an ingenious contrivance.
彼は機巧を凝らしたおもちゃを作るのが好きだ。
He likes making toys with clever tricks.