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Definitions and Synonyms of u | Another word for u | What is u?

Definition 1: the 21st letter of the Roman alphabet - [noun denoting communication]

(u is a kind of ...) the conventional characters of the alphabet used to represent speech

"his grandmother taught him his letters"

(... is a member of u) the alphabet evolved by the ancient Romans which serves for writing most of the languages of western Europe

Definition 2: a heavy toxic silvery-white radioactive metallic element; occurs in many isotopes; used for nuclear fuels and nuclear weapons - [noun denoting substance]

Synonyms for u in the sense of this definition

(u is a kind of ...) any of several chemical elements that are usually shiny solids that conduct heat or electricity and can be formed into sheets etc.

(... is a kind of u ) a uranium isotope with mass number 235; capable of sustaining chain reactions

(... is a kind of u ) the commonest isotope of uranium; it is not fissionable but when irradiated with neutrons it produces fissionable plutonium 239

(... is made of the substance u) a mineral consisting of uranium oxide and trace amounts of radium and thorium and polonium and lead and helium; uraninite in massive form is called pitchblende which is the chief uranium ore

Definition 3: a base containing nitrogen that is found in RNA (but not in DNA) and derived from pyrimidine; pairs with adenine - [noun denoting substance]

Synonyms for u in the sense of this definition

(u is a kind of ...) a phosphoric ester of a nucleoside; the basic structural unit of nucleic acids (DNA or RNA)

(... is made of the substance u) (biochemistry) a long linear polymer of nucleotides found in the nucleus but mainly in the cytoplasm of a cell where it is associated with microsomes; it transmits genetic information from DNA to the cytoplasm and controls certain chemical processes in the cell

"ribonucleic acid is the genetic material of some viruses"

Definition 4: (chiefly British) of or appropriate to the upper classes especially in language use - [adjective satellite denoting all]

(u is similar to ...) occupying the highest socioeconomic position in a society

(u belongs to a domain located in ...) a monarchy in northwestern Europe occupying most of the British Isles; divided into England and Scotland and Wales and Northern Ireland; `Great Britain' is often used loosely to refer to the United Kingdom

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