U (Noun)
Meaning 1
The 21st letter of the Roman alphabet.
Classification
Nouns denoting communicative processes and contents.
Synonyms
Hypernyms
Meaning 2
A base containing nitrogen that is found in RNA (but not in DNA) and derived from pyrimidine; pairs with adenine.
Classification
Nouns denoting substances.
Synonyms
Hypernyms
Meaning 3
A heavy toxic silvery-white radioactive metallic element; occurs in many isotopes; used for nuclear fuels and nuclear weapons.
Classification
Nouns denoting substances.