alphabetical · adjective /ˌæl.fəˈbet̬.ɪ.kəl/
alphabetical
B2 arranged in the same order as the letters of the alphabet
Dictionary examples:
an alphabetical list
The names are published in alphabetical order.
Learner example:
She looked again at the strange words and then she understood. Each letter ha[d] been replaced by the next one in the alphabetical order. (First Certificate in English; B2; French)