LMO

LMO may refer to:

Science and technology

 * Lanthanum manganite (LaMnO3), an inorganic compound
 * Lithium ion manganese oxide battery (LiMn2O4, etc., or LMO), a cathode material for lithium-ion batteries
 * Lithium molybdate (Li2MoO4), an inorganic compound
 * Living modified organism or genetically modified organism
 * Lunar magma ocean, layer of molten rock theorized to have been present on the surface of the Moon

Other uses

 * Lombard language (ISO 639:1 code), of northern Italy and southern Switzerland
 * RAF Lossiemouth (IATA airport code), Scotland
 * LMO (album), by Rage and Lingua Mortis Orchestra
 * Lego Minifigures Online, a defunct massively multiplayer video game