looking up by reading
Refers to searching for a word or kanji in a dictionary by its pronunciation, as opposed to by radical or stroke count. Common in contexts like 音引き辞書 or 音引き検索.
You can look up words in this dictionary by their reading.
prolonged sound mark
Colloquial term for the long vowel mark (ー) used in katakana, and sometimes for the hiragana equivalent. More formally called 長音符 (ちょうおんぷ).
See also: 長音符 (ちょうおんぷ)
The katakana prolonged sound mark is 'ー'.
Compound of 音 (おん, 'sound, reading') and 引き (びき, 'pulling, looking up'), from the verb 引く (ひく, 'to pull, to look up'). The second sense is a colloquial extension referring to the mark that 'pulls' a sound longer.