O.
中文翻譯：
【醫】 O型, 菌體型, 不動型(細菌)字典網
英文解釋：
名詞 o.:
- a nonmetallic bivalent element that is normally a colorless odorless tasteless nonflammable diatomic gas; constitutes 21 percent of the atmosphere by volume; the most abundant element in the earth's crust同義詞：oxygen, O, atomic number 8
- the 15th letter of the Roman alphabet同義詞：O, letter o
- the blood group whose red cells carry neither the A nor B antigens同義詞：O, type O, group O