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n.
名词
- 英语字母中的第二十一个字母
- 【化】元素铀的符号
- <英口>上流社会,上层阶级
- U音
- U铅字或图章等
- 表示"第二十一"的符号
- 缅甸男子姓名前的专称
abbr.
缩略词
- = atomic mass unit 原子质量单位
adj.
形容词
- 上层阶级的,上流社会的
Noun:
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a base containing nitrogen that is found in RNA (but not in DNA) and derived from pyrimidine; pairs with adenine
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a heavy toxic silvery-white radioactive metallic element; occurs in many isotopes; used for nuclear fuels and nuclear weapons
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the 21st letter of the Roman alphabet
Adjective:
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(chiefly British) of or appropriate to the upper classes especially in language use
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