a vs an vs and
a
Definitions
noun
- a metric unit of length equal to one ten billionth of a meter (or 0.0001 micron); used to specify wavelengths of electromagnetic radiation
- the 1st letter of the Roman alphabet
- the blood group whose red cells carry the A antigen
- (biochemistry) purine base found in DNA and RNA; pairs with thymine in DNA and with uracil in RNA
- one of the four nucleotides used in building DNA; all four nucleotides have a common phosphate group and a sugar (ribose)
Examples
The Staff of Volans has a limited supply of magic energy. Roll a dice after each spell is cast.
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.
an
Definitions
noun
- an associate degree in nursing
Examples
The Staff of Volans has a limited supply of magic energy. Roll a dice after each spell is cast.
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.
