u (Croatian)

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u

Noun

a base containing nitrogen that is found in RNA (but not in DNA) and derived from pyrimidine; pairs with adenine

Synonyms:

• uracil
• U

Noun

a heavy toxic silvery-white radioactive metallic element; occurs in many isotopes; used for nuclear fuels and nuclear weapons

Synonyms:

• uranium
• U
• atomic number 92

Noun

the 21st letter of the Roman alphabet

Synonyms:

• U
• u

Adjective

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

Synonyms:

• u