a vs an vs and

Definitions

noun

1. a metric unit of length equal to one ten billionth of a meter (or 0.0001 micron); used to specify wavelengths of electromagnetic radiation
2. the 1st letter of the Roman alphabet
3. the blood group whose red cells carry the A antigen
4. (biochemistry) purine base found in DNA and RNA; pairs with thymine in DNA and with uracil in RNA
5. one of the four nucleotides used in building DNA; all four nucleotides have a common phosphate group and a sugar (ribose)

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Examples

The difficulties of the next year or two will, no doubt, reawaken the pro-euro lobby.

Liberal democracy is a fraud, a cover for the power of the elite.

There were 42 free-kicks, two penalties, four bookings and three players sent off, two of whom had to be escorted from the pitch by police.

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Definitions

noun

1. an associate degree in nursing

Examples

There were 42 free-kicks, two penalties, four bookings and three players sent off, two of whom had to be escorted from the pitch by police.

Season with a pinch of salt and pepper.

I can't find any relevant material on him in the library.

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