Moment

Japanese: モーメント

〘noun〙 (moment)⸨moment⸩① A very short period of time. An instant. A fleeting moment. ※Futari Nyobo (1891-92) by Koyo Ozaki, Vol . 1, "I only caught a glimpse of him at that moment. "② An opportunity. ※Bullet Journal (1929) by Kenji Miyamoto, Vol. 3, "In telling the whole story of the man, it only provides one moment."③ An element. ※Eiga Jidai (1930) by Torahiko Terada, "There are many examples in haiku that skillfully incorporate the 'voice shadow.' For example, 'The salesman shouts his name loudly,' is a moment in a comedy."④ The vector product of a vector quantity at a certain point P and a position vector from the origin to point P is called the vector quantity's moment about the origin. When the vector quantity is a force, it is called the force moment, and it is the magnitude of the torque about the origin. ⑤ When there is a pair of positive and negative charges, the product of the position vector pointing from the negative charge to the positive charge and the amount of charge is called the electric dipole moment.

Source: The Selected Edition of the Japanese Language Dictionary About the Selected Edition of the Japanese Language Dictionary Information

Japanese:

〘名〙 (moment)⸨モメント⸩① 非常に短い時間。瞬間。刹那(せつな)。※二人女房（1891‐92）〈尾崎紅葉〉上「其瞬間(モオメント)に瞥見したばかり」② 契機。きっかけ。※敗北の文学（1929）〈宮本顕治〉三「氏の全貌を語る上に、それは、一つのモメントを提供するに過ぎない」③ 要素。※映画時代（1930）〈寺田寅彦〉「俳句には矢張実に巧みに『声の影法師』を取り入れた実例が多い。例えば〈略〉『物うりの尻声高く名乗すて』は喜劇中のモーメントである」④ ある点Ｐにおけるベクトル量と原点からＰ点に向かう位置ベクトルとのベクトル積を、ベクトル量の原点のまわりのモーメントという。ベクトル量が力のときは、力のモーメントといい、原点のまわりのトルクの大きさになる。⑤ 一対の正負の電荷があるとき、負の電荷から正の電荷に向かう位置ベクトルと電荷量の積を電気双極子モーメントという。

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