LCT may refer to: Science Biology Lysosomal cystine transporter family Long-chain triglyceride LCT gene, a gene that encodes the enzyme lactase Chemistry Lower consolute temperature, the critical temperature below which the components of a mixture are miscible for all compositions Mathematics and computers Limit comparison test, for series convergence Linear canonical transformation, an integral transform Link/cut tree, a data structure for maintaining dynamic trees Transportation Lake Champlain Transportation Company, US Lane Cove Tunnel, a toll road in Sydney, Australia Lorain County Transit, Ohio, US Luxury Car Tax, Australia the ICAO airline code for TAR Aerolineas Other uses Labour Congress of Thailand Landing craft tank Language and Communication Technologies LCT resort, Busan, South Korea Ligue Communiste des Travailleurs, former Senegal political party Local Civil time Low-carbon technology (disambiguation)