In English orthography, the letter A represents 44 Sounds Phonemes of English

The importance of vowels in distinguishing one word from another varies from language to language. Nearly all languages have at least three phonemic vowels, usually /i/, /a/, /u/. Ndu languages have been argued to have just two, /ə/ and /a/, with [ɨ] being epenthetic. In rhotic dialects of English, as in Canada and the United States, there are many words such as bird, learn, girl, church, worst, wyrm, myrrh  that some phoneticians analyze as having no vowels, only a syllabic consonant /ɹ̩/. In the earliest Greek inscriptions after the Greek Dark Ages, dating to the 8th century BC, the letter rests upon its side, but in the Greek alphabet of later times it generally resembles the modern capital letter

  • in algebra, is used to represent known quantities
  • in geometry  is used as one of the letters to represent an angle in a triangle
  • in logic is used to signify the universal affirmative
  • is used to denote size, as in a brassiere
  • in work practices represents angle of asymmetry
  • in finance denotes stock and bond rating
  • in slang denotes buttocks

Euouae, at six letters long, is the longest English word consisting only of vowels also, the word with the most consecutive vowels. Euouae – medieval musical term which indicates the vowels of the syllables of seculorum Amen  which ends the  Gloria Patri

wikipedia, Encyclopædia Britannica, www.cavitas-oris.com

literki – www.cavitas-aris.com