What phonetic alphabet term corresponds to the letter "A"?

The term that corresponds to the letter "A" in the phonetic alphabet is indeed "Alpha." This is part of the International Radiotelephony Spelling Alphabet, which is used in various fields, including aviation and military communications, to ensure clarity and avoid misunderstandings in spoken communication. Each letter of the alphabet is assigned a code word to represent it clearly, particularly over radio transmissions where static and interference may cause confusion. "Alpha" is the first word in this standardized set, making it a foundational part of the system that promotes effective communication.