are small, annotative gloss

Gloss

A gloss is a brief notation of the meaning of a word or wording in a text. It may be in the language of the text, or in the reader's language if that is different....

es that can be placed above or to the right of a Chinese character

Chinese character

Chinese characters are logograms used in the writing of Chinese and Japanese , less frequently Korean , formerly Vietnamese , or other languages...

 when writing languages with logographic

Logogram

A logogram, or logograph, is a grapheme which represents a word or a morpheme . This stands in contrast to phonograms, which represent phonemes or combinations of phonemes, and determinatives, which mark semantic categories.Logograms are often commonly known also as "ideograms"...

 characters such as Chinese

Chinese language

The Chinese language is a language or language family consisting of varieties which are mutually intelligible to varying degrees. Originally the indigenous languages spoken by the Han Chinese in China, it forms one of the branches of Sino-Tibetan family of languages...

 or Japanese

Japanese language

is a language spoken by over 130 million people in Japan and in Japanese emigrant communities. It is a member of the Japonic language family, which has a number of proposed relationships with other languages, none of which has gained wide acceptance among historical linguists .Japanese is an...

 to show the pronunciation. Typically called just ruby or rubi, such annotations are usually used as a pronunciation guide for relatively obscure characters.
Here is an example of Japanese ruby characters (called furigana

Furigana

is a Japanese reading aid, consisting of smaller kana, or syllabic characters, printed next to a kanji or other character to indicate its pronunciation. In horizontal text, yokogaki, they are placed above the line of text, while in vertical text, tategaki, they are placed to the right of the line...

) for Tokyo

Tokyo

, ; officially , is one of the 47 prefectures of Japan. Tokyo is the capital of Japan, the center of the Greater Tokyo Area, and the largest metropolitan area of Japan. It is the seat of the Japanese government and the Imperial Palace, and the home of the Japanese Imperial Family...

 (""):


Most furigana (Japanese ruby characters) are written with the hiragana

Hiragana

is a Japanese syllabary, one basic component of the Japanese writing system, along with katakana, kanji, and the Latin alphabet . Hiragana and katakana are both kana systems, in which each character represents one mora...

syllabary, but katakana

Katakana

is a Japanese syllabary, one component of the Japanese writing system along with hiragana, kanji, and in some cases the Latin alphabet . The word katakana means "fragmentary kana", as the katakana scripts are derived from components of more complex kanji. Each kana represents one mora...

and romaji are also occasionally used.