あ段

あ (a) +‎ 段 (“grade”)

• (Tokyo) あだん [áꜜdàǹ] (Atamadaka – [1])
• IPA^(key): [a̠dã̠ɴ]

あ段(だん) • (adan) 

1. (phonology, orthography, grammar) the first and highest-graded column of the 五十音図 (literally “table of the fifty sounds”), consisting of the ten kana あ/ア (a), か/カ (ka), さ/サ (sa), た/タ (ta), な/ナ (na), は/ハ (ha), ま/マ (ma), や/ヤ (ya), ら/ラ (ra) and わ/ワ (wa)

   Synonym: あ列

   Coordinate terms: あ行, い段, う段, え段, お段