say it: yoo
u is a noun and adjective meaning "a base containing nitrogen that is found in RNA (but not in DNA) and derived from pyrimidine; pairs with adenine". It carries 4 recorded senses.
a base containing nitrogen that is found in RNA (but not in DNA) and derived from pyrimidine; pairs with adenine
a heavy toxic silvery-white radioactive metallic element; occurs in many isotopes; used for nuclear fuels and nuclear weapons
the 21st letter of the Roman alphabet
(chiefly British) of or appropriate to the upper classes especially in language use
United Kingdom
Forms marked · are formed by the regular rule rather than recorded in the source data. English keeps a few hundred irregulars and the rest follow the pattern, so the rule is right far more often than not — but it is a rule, and the mark says so.
Definitions, synonyms and semantic relations for u come from Princeton University’s WordNet. The pronunciation comes from the CMU Pronouncing Dictionary. Commonness is measured against a corpus of everyday English. Full sources and licences.