the 21st letter of the Roman alphabet
complete reversal of direction of travel
a submersible warship usually armed with torpedoes
not characteristic of the upper classes especially in language use
the 23rd letter of the Roman alphabet
the 21st letter of the Roman alphabet
(chiefly British) of or appropriate to the upper classes especially in language use
a heavy toxic silvery-white radioactive metallic element; occurs in many isotopes; used for nuclear fuels and nuclear weapons
a base containing nitrogen that is found in RNA (but not in DNA) and derived from pyrimidine; pairs with adenine
