液化 (E̍k-hòa)天然氣 (thian-jiân-khì) (液化天然氣),簡稱 (kán-chheng)LNG,是 (sī)佇 (tī)常壓 (siông-ap)孝 (hà)是會體 (ē-thé)的 (ê)天然氣。一般 (It-poaⁿ)液化天然氣佇普通 (phó͘-thong)大氣壓 (tāi-khì-ap)下 (hā)是氣體 (khì-thé),毋過 (m̄-koh)通 (thang)經由 (keng-iû)降溫 (kàng-un)到 (kàu)零下 (lêng-hā)163拉氏 (lia̍p-sī)度 (tō͘)來 (lâi)液化。