What does 長～ mean?
長～ is a Japanese noun meaning “long ~” in English. It is written as 長～ in kanji, ちょう～ in hiragana, and chou～ in romaji. This word is part of JLPT N2 vocabulary.
Example sentence
トムは何時間も長電話をしている。
Tom has been talking on the phone for hours.