ꞏ

Etymology
The middot used as a letter.

Letter

 * 1)  vowel length, used in the alphabets of a number of American languages (e.g. see $⟨aꞏ⟩$). A less-common variant is $⟨꞉⟩$.
 * 2)  The 'neutral' tone (a toneless syllable) in pinyin, e.g. Mandarin 吗 ·ma, or 知道 zhī·dào (pronounced either zhīdào or zhīdao). The zhuyin equivalent is ˙|$⟨˙⟩$
 * 3) Used to transliterate the 'Phags-pa letter &.

Derived terms

 * aꞏ, eꞏ, iꞏ, oꞏ, uꞏ

Letter

 * 1)  the dental click, modern $⟨ǀ⟩$ (Besides plain $⟨ꞏ⟩$, it is also used for the dental click consonants $⟨ꞏk ꞏg ꞏn ꞏh ꞏkh ꞏch⟩$.)
 * See also ꞉, ʼ, ʻ.