अर्थ : A base containing nitrogen that is found in RNA (but not in DNA) and derived from pyrimidine. Pairs with adenine.

अर्थ : A heavy toxic silvery-white radioactive metallic element. Occurs in many isotopes. Used for nuclear fuels and nuclear weapons.

अर्थ : The 21st letter of the Roman alphabet.

अर्थ : (chiefly British) of or appropriate to the upper classes especially in language use.