Ā

:"For A. E. van Vogt's novel, see The World of Null-A."

Ā, lowercase ā, is a grapheme, a Latin A with a macron, is used in several orthographies.

In the Latvian alphabet, Ā represents a distinct vowel and comes after A and before B in alphabetical order: for instance "baznīca" comes before "bārda" in a Latvian dictionary. It is considered as a separate letter in the Latvian alphabet. Ā is used to denote a long A in Latvian.

In some languages Ā is used to denote a long A. Examples are the Polynesian languages, including Māori, some romanizations of Japanese (rōmaji) and Arabic, and some Latin texts (especially for learners). It is used in some orthography-based transcriptions of English to represent the diphthong [eɪ] ( [eː] in some dialects), and also in commercial names such as Drāno and Powerāde.

In Pinyin, Ā denotes A in the first tone of Mandarin Chinese.

In all these languages, Ā is sorted with other As and is not considered a separate letter. The macron is only considered when sorting words that are otherwise identical. For example, in Māori, "tāu" (meaning "your") comes after "tau" (meaning "year"), but before "taumata" ("hill").

Unicode

In Unicode, Ā is code 256 (hex 100) and ā is code 257 (hex 101). These are the first codes that come after the initial ISO-8859-1 subset of Unicode.