and vs a: What's the difference?

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Which is correct: And or a

How to spell And?

And
Correct Spelling
a
Correct Spelling
Andverb

A particle which expresses the relation of connection or addition. It is used to conjoin a word with a word, a clause with a clause, or a sentence with a sentence.

anoun

one of the four nucleotides used in building DNA; all four nucleotides have a common phosphate group and a sugar (ribose)

anoun

the blood group whose red cells carry the A antigen

anoun

any of several fat-soluble vitamins essential for normal vision; prevents night blindness or inflammation or dryness of the eyes

anoun

the basic unit of electric current adopted under the Systeme International d'Unites

anoun

a metric unit of length equal to one ten billionth of a meter (or 0.0001 micron); used to specify wavelengths of electromagnetic radiation

anoun

(biochemistry) purine base found in DNA and RNA; pairs with thymine in DNA and with uracil in RNA

anoun

the 1st letter of the Roman alphabet

And Illustrations

a Illustrations

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