u

關於u的翻譯

字母u

u definition

1. a base containing nitrogen that is found in RNA (but not in DNA) and derived from pyrimidine; pairs with adenine
2. a heavy toxic silvery-white radioactive metallic element; occurs in many isotopes; used for nuclear fuels and nuclear weapons
3. the 21st letter of the Roman alphabet
4. (chiefly British) of or appropriate to the upper classes especially in language use