alphabet

Từ điển American Heritage Dictionary 4th

al·pha·bet (ălʹfə-bĕt', -bĭt)n.
1. The letters of a language, arranged in the order fixed by custom.
2. A system of characters or symbols representing sounds or things.
3. A set of basic parts or elements: “genetic markers... that contain repeated sequences of the DNA alphabet” (Sandra Blakeslee).  [Middle English alphabete, from Latin alphabētum, from Greek alphabētos: alpha, alpha; see alpha + bēta, beta; see beta.]

• Từ đồng nghĩa / Synonyms:
  rudiment, first rudiment, first principle, ABC, ABC's, ABCs