al·pha·bet·i·cal 
(ăl′fə-bĕtĭ-kəl) also al·pha·bet·ic (-bĕtĭk)
(ăl′fə-bĕtĭ-kəl) also al·pha·bet·ic (-bĕtĭk)adj.
1. Arranged in the customary order of the letters of a language.
2. Of, relating to, or expressed by an alphabet.
al′pha·beti·cal·ly adv.