(Internet slang, often humorous) Used to abbreviate words or sentences when the rest is implicitly known.

Visual rendering of Morse code for キ.

Visual rendering of Morse code for ヘ.

(nonstandard) Alternative form of ー (“long vowel mark”)

Alternative form of er (ā)

The hiragana syllable る (ru) or the katakana syllable ル (ru) in Japanese braille.

Alternative form of 丑

A diacritical mark of the Latin script, called マクロン (“macron”) in Japanese, and found on Ā/ā, Ē/ē, Ī/ī, Ō/ō and Ū/ū.

Visual rendering of Morse code for チ.

Used as a plaintext fallback of ruby: encloses a regular or traditional pronunciation to kanji (sometimes other types of words, e.g. katakana in parentheses following an English word) that the readers may not necessarily know how to read.