O (EN)

文字、名詞、助詞、固有名詞、記号

文字 “O”

1. 「o」の大文字形
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   Olivia wrote her name with a big "O" at the beginning.

名詞 “O”

1. AまたはBの抗原が欠けている血液型
   Since she has type O blood, she can only receive donations from others with the same type.
2. オーガズムの俗語
   After months of trying, she finally experienced her first O with her partner.
3. アヘンの俗語
   He pulled out a small pouch and whispered, "Got some O if you're looking to relax."

助詞 “O”

1. お（話し相手を呼びかける時）
   O Captain! My Captain! Our fearful trip is done.

固有名詞 “O”

1. オ（韓国または中国の姓）
   Mrs. O, originally from Seoul, is known for her delicious kimchi recipe.

記号 “O”

1. 酸素の記号
   Water is composed of two hydrogen atoms and one oxygen atom, represented chemically as H2O.
2. O（数学で、特定の関数によって上から漸近的に束縛される関数のクラス）
   In algorithm analysis, if we say a sorting algorithm is O(n log n), it means its time complexity will not grow faster than n log n times some constant, for large enough n.
3. O（線形代数や群論で、直交群を示す）
   In our study of symmetries, we learned that the set of rotations and reflections of a square forms an orthogonal group, denoted as O(2).