China 
Africa 
- Lambert
- Lambert's cosine law
- Lambertian reflectance
- Lambeth Group
- Lame
- Lamella clarifier
- Lamellae
- Lamellar
- Lamellar bodies
- Lamellar phase
- Lamellar structure
- Lamellipodia
- Lamina
- Lamina dura
- Lamina propria
- Laminar flame speed
- Laminar flow
- Laminar flow cabinet
- Laminar flow reactor
- Laminar sublayer
- Laminarin
- Laminate flooring
- Laminated
- Laminated glass
- Laminates
- Lamination
- Laminin
- Lamp2
- Lamprophyre
- Lanczos algorithm
- Lanczos resampling
- Land
- Land change science
- Land clearing
- Land consumption
- Land degradation
- Land footprint
- Land loss
- Land management
- Land reclamation
- Land rehabilitation
- Land restoration
- Land-use change
- Landau damping
- Landau level
- Landau theory
- Landfarming
- Landfill fire
- Landfill gas
- Landfill gas migration
- Landfill gas utilization
- Landfill liner
- Landfill mining
- Landfill restoration
- Landfill tax
- Landfills
- Landing
- Landing area
- Landing fees
- Landing flare
- Landing gear
- Landing lights
- Landing page
- Landing performance
- Landline
- Landmark point
- Landsat
- Landsat program
- Landscape
- Landscape architecture
- Landscape assessment
- Landscape design
- Landscape ecology
- Landscape lighting
- Landscape planning
- Landscaping
- Landslide dam
- Landslide mitigation
- Landslides
- Landweber iteration
- Lane centering
- Lane departure warning system
- Langasite
- Langbeinite
- Langerhans cells
- Langevin dynamics
- Langevin equation
- Langevin function
- Langmuir
- Langmuir adsorption model
- Langmuir probes
- Language codes
- Language development
- Language disorder
- Language identification
- Language model
- Language of mathematics
- Language processing
- Language resources
- Lanolin
- Lanosterol
- Lantern
- Lanthanide contraction
- Lanthanides
- Lanthanum
- Lanthanum aluminate
- Lanthanum bromide
- Lanthanum hexaboride
- Lanthanum hydroxide
- Lanthanum manganite
- Lanthanum oxide
- Lanthanum-140
- Lantibiotics
- Laparoscopy
- Laparotomy
- Lapilli
- Laplace distribution
- Laplace expansion
- Laplace operator
- Laplace pressure
- Laplace transform
- Laplace's equation
- Laplace's method
- Laplacian
- Laplacian matrix
- Lapping
- Lapping film
- Lapse rate
- Laptop
- Large deviations theory
- Large intestine
- Large number
- Large woody debris
- Larmor precession
- Larnite
- Larson-Miller parameter
- Laryngeal inlet
- Laryngitis
- Laryngoscopy
- Larynx
- Laser
- Laser ablation
- Laser beam machining
- Laser beam profiler
- Laser beam quality
- Laser beam welding
- Laser bonding
- Laser cooling
- Laser cutting
- Laser damage threshold