Alphabetical (adjective)

1. Arranged in the order of the letters of the alphabet.
2. Relating to or expressed by means of an alphabet.

Origin:

Late 16th century: from medieval latin alphabeticus, from greek alphabētos "the alphabet", from alpha + bēta "the first two letters".

Examples:

1. The dictionary was arranged alphabetically by word.
2. The phone directory was listed in alphabetical order by last name.
3. The teacher asked the students to put the words in alphabetical order.
4. The list of ingredients was presented in alphabetical order.
5. The new software allows you to search for a contact in alphabetical order.