- largehead atractylodes rhizome
- largehead hairtail
- Large Heavy Ion National Accelerator
- Large High Altitude Air Shower Observatory
- large high altitude air shower observatory
- large igneous province
- large inclusions in steel
- large Indian civet
- large indivisible load transport special purpose vehicle
- large inductive dimension
- large intelligent material-handling equipment
- large intestinal gland
- large intestine
- large intestine cutaneous region of hand yangming
- large ion lithophile elements
- large jellyfish bloom
- large landscape seedling cultivation
- large launch vehicle mobile launch platform
- largeleaf gentian root
- largeleaf hydrangea
- largeleaf japanese ginseng rhizome
- large-leaf lantana
- Large Liquid-Aperture Mirror Array
- large lymphocyte
- Large Magellanic Cloud