a
a
ə
ē
/ə/

āχāĻ‚āϰ⧇āϜāĻŋāϤ⧇ "a"āĻāϰ āϏāĻ‚āĻœā§āĻžāĻž āĻ“ āĻ…āĻ°ā§āĻĨ

01

āĻāĻ•āϟāĻŋ

used when we want to talk about a person or thing for the first time or when other people may not know who or what they are
a definition and meaning
āωāĻĻāĻžāĻšāϰāĻŖ
She found a job at a company downtown.
āϤāĻŋāύāĻŋ āĻļāĻšāϰ⧇āϰ āϕ⧇āĻ¨ā§āĻĻā§āϰ⧇ āĻāĻ•āϟāĻŋ āϕ⧋āĻŽā§āĻĒāĻžāύāĻŋāϤ⧇ āĻāĻ•āϟāĻŋ āϚāĻžāĻ•āϰāĻŋ āĻĒ⧇āϝāĻŧ⧇āϛ⧇āύāĨ¤
1.1

āĻāĻ•āϟāĻŋ

used before a noun when we are not talking about a specific person or thing
āωāĻĻāĻžāĻšāϰāĻŖ
She brought a gift for the birthday party.
āϤāĻŋāύāĻŋ āϜāĻ¨ā§āĻŽāĻĻāĻŋāύ⧇āϰ āĻĒāĻžāĻ°ā§āϟāĻŋāϰ āϜāĻ¨ā§āϝ āĻāĻ•āϟāĻŋ āωāĻĒāĻšāĻžāϰ āĻāύ⧇āĻ›āĻŋāϞ⧇āύāĨ¤
02

āĻāĻ•āϟāĻŋ, āĻāĻ•

used to show someone or something belongs to a group or type
āωāĻĻāĻžāĻšāϰāĻŖ
He is a student in the university.
āϤāĻŋāύāĻŋ āĻŦāĻŋāĻļā§āĻŦāĻŦāĻŋāĻĻā§āϝāĻžāϞāϝāĻŧ⧇ āĻāĻ•āϜāύ āĻ›āĻžāĻ¤ā§āϰāĨ¤
01

āĻ¸ā§āĻŦāϰ āϞāĻž, āϞāĻž

the musical pitch A, which is a specific note in the diatonic scale commonly used in Western music
02

āĻ…ā§āϝāĻžāĻ‚āĻ¸ā§āĻŸā§āϰāĻŽ, āĻĻ⧈āĻ°ā§āĻ˜ā§āϝ⧇āϰ āĻāĻ•āϟāĻŋ āĻāĻ•āĻ• āϝāĻž āĻāĻ• āĻŽāĻŋāϟāĻžāϰ⧇āϰ āĻĻāĻļ āĻŦāĻŋāϞāĻŋāϝāĻŧāύ āĻ­āĻžāϗ⧇āϰ āĻāĻ• āĻ­āĻžāϗ⧇āϰ āϏāĻŽāĻžāύ

a metric unit of length equal to one ten billionth of a meter (or 0.0001 micron); used to specify wavelengths of electromagnetic radiation
03

āĻāĻ•, āϰāĻ•ā§āϤ⧇āϰ āĻ—ā§āϰ⧁āĻĒ A

the blood group whose red cells carry the A antigen
04

āϰ⧋āĻŽāĻžāύ āĻŦāĻ°ā§āĻŖāĻŽāĻžāϞāĻžāϰ āĻĒā§āϰāĻĨāĻŽ āĻ…āĻ•ā§āώāϰ, āĻ…āĻ•ā§āώāϰ A

the 1st letter of the Roman alphabet
05

āĻ…ā§āϝāĻžāĻĄā§‡āύāĻŋāύ, āĻĄāĻŋāĻāύāĻ āϤ⧈āϰāĻŋ āĻ•āϰāϤ⧇ āĻŦā§āϝāĻŦāĻšā§ƒāϤ āϚāĻžāϰāϟāĻŋ āύāĻŋāωāĻ•ā§āϞāĻŋāĻ“āϟāĻžāχāĻĄā§‡āϰ āĻŽāĻ§ā§āϝ⧇ āĻāĻ•āϟāĻŋ

one of the four nucleotides used in building DNA; all four nucleotides have a common phosphate group and a sugar (ribose)
06

āĻ…ā§āϝāĻžāĻĄā§‡āύāĻŋāύ, āĻĄāĻŋāĻāύāĻ āĻāĻŦāĻ‚ āφāϰāĻāύāĻāϤ⧇ āĻĒāĻžāĻ“āϝāĻŧāĻž āĻĒāĻŋāωāϰāĻŋāύ āĻŦ⧇āϏ

(biochemistry) purine base found in DNA and RNA; pairs with thymine in DNA and with uracil in RNA
LanGeek
āĻ…ā§āϝāĻžāĻĒ āĻĄāĻžāωāύāϞ⧋āĻĄ āĻ•āϰ⧁āύ