「旋回」、（巻貝の）「渦巻き」、あるいは為替や株価の「乱高下」を表す、"gyration" も中々覚えられない単語だったのですが、ジャイロ、"gyrocompass": 回転羅針儀の "gyro" と元は同じだと気がついたので今度は覚えられそうです。
英英辞書で"gyration" を引くと
1. circular movement: movement in a circle around a fixed center; the gyration of the rotor
2. something gyrate: a spiral or coil-shaped thing or part
"gyration" の動詞は "gyrate" で、例文は：
The dancers gyrated wildly to the beat of the music.
A line of male dancers gyrated to the music while the audience screamed their appreciation.
この例文で昨年11月に観光旅行で行ったトルコのコンヤにあった、イスラム教の一派、メヴレヴィ教の霊廟とセマーダンス（旋舞）の事を思い出しました。
以下はメヴレヴィ教の旋舞(sema)とsemaを踊るDervishes(墓石を象徴する白い筒状の帽子を被った僧）についてのWikipediaからの記述です。
The Mevlevi, or "The Whirling Dervishes", believe in performing their dhikr in the form of a "dance" and music ceremony called the sema.
The Sema represents a mystical journey of man's spiritual ascent through mind and love to "Perfect." Turning towards the truth, the follower grows through love, deserts his ego, finds the truth and arrives at the "Perfect." He then returns from this spiritual journey as a man who has reached maturity and a greater perfection, so as to love and to be of service to the whole of creation.
The sema was practiced in the semahane (ritual hall) according to a precisely prescribed symbolic ritual with the dervished whirling in a circle around their sheikh, who is the only one circling around his axis. The dervishes wear a white gown (symbol of death), a wide black cloak (hirka) (symbol of the grave) and a high brown cap (kulah), symbol of the tombstone.
英英辞書で"gyration" を引くと
1. circular movement: movement in a circle around a fixed center; the gyration of the rotor
2. something gyrate: a spiral or coil-shaped thing or part
"gyration" の動詞は "gyrate" で、例文は：
The dancers gyrated wildly to the beat of the music.
A line of male dancers gyrated to the music while the audience screamed their appreciation.
この例文で昨年11月に観光旅行で行ったトルコのコンヤにあった、イスラム教の一派、メヴレヴィ教の霊廟とセマーダンス（旋舞）の事を思い出しました。
以下はメヴレヴィ教の旋舞(sema)とsemaを踊るDervishes(墓石を象徴する白い筒状の帽子を被った僧）についてのWikipediaからの記述です。
The Mevlevi, or "The Whirling Dervishes", believe in performing their dhikr in the form of a "dance" and music ceremony called the sema.
The Sema represents a mystical journey of man's spiritual ascent through mind and love to "Perfect." Turning towards the truth, the follower grows through love, deserts his ego, finds the truth and arrives at the "Perfect." He then returns from this spiritual journey as a man who has reached maturity and a greater perfection, so as to love and to be of service to the whole of creation.
The sema was practiced in the semahane (ritual hall) according to a precisely prescribed symbolic ritual with the dervished whirling in a circle around their sheikh, who is the only one circling around his axis. The dervishes wear a white gown (symbol of death), a wide black cloak (hirka) (symbol of the grave) and a high brown cap (kulah), symbol of the tombstone.
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