noun
A room equipped with audio and visual devices for learning foreign languages. Often abbreviated as LL.
大学のランゲージラボラトリーで英語の発音を練習した。
I practiced English pronunciation in the university's language laboratory.
Variant with interpunct; less common but still seen.
LL教室 is a more common Japanese abbreviation for 'language laboratory', while ランゲージラボラトリー is the full loanword form.
Loanword from English 'language laboratory'.