| Acronym | Definition |
|---|
| L | Low (transmissions) |
| L | Left |
| L | Liter |
| L | 50 (Roman numeral) |
| L | Line |
| L | Local |
| L | Links (German: left) |
| L | Level |
| L | Latin |
| L | Limited Time (broadcasting operating schedules) |
| L | Loss |
| L | Large (size) |
| L | Lake |
| L | Low Risk |
| L | Limited (Catholic movie rating) |
| L | Light (Infantry) |
| L | Label |
| L | Literature |
| L | Load |
| L | Limited Distribution |
| L | Lesbian |
| L | Laser (US military aircraft basic mission designation) |
| L | License (Microsoft) |
| L | Leipzig (auto license plate) |
| L | Central Ontario (postal code designation, Canada) |
| L | Lecture |
| L | Legal Affairs |
| L | Lei (Law) |
| L | Lap (welded joint type) |
| L | Lire (Italian currency) |
| L | Launch |
| L | Luxembourg (ISO Country Identifier) |
| L | Laughing |
| L | Loop (train transportation system) |
| L | Lima |
| L | Federal Reserve Bank of San Francisco (designates original point of circulation of a dollar bill) |
| L | Liverpool (postcode, United Kingdom) |
| L | Loser |
| L | Latency (network communications) |
| L | Lockheed (as in L-1011) |
| L | Libertarian (political party) |
| L | Libra (Latin: Pound) |
| L | Liberty Media Corporation (stock symbol) |
| L | Leader Program |
| L | Cold Weather (US military aircraft modified mission symbol) |
| L | Polymerase (virus protein identifier) |
| L | Ligand (chemistry) |
| L | Logarithmic (complexity theory) |
| L | Luminosity |
| L | Inductance |
| L | Leucine (amino acid) |
| L | Longacre (designer of Indian Head penny; mint mark) |
| L | Lewisite |
| L | Linesman (high school football; similar to head linesman) |
| L | Lumbar Vertebra (prefix, as in L-1, L-2) |
| L | Length of leg |
| L | Levorotary (optical rotation) |
| L | Azimuthal Quantum Number (used in formulae in quantum physics) |
| L | $100 Cigar |
| L | Lord or Baron (British title of nobility) |
| L | Lavorotatory |
| L | US DoT tire speed rating (75 mph) |
| L | Laser Research and Technology Division (LANL) |
| L | Length of side or any unspecified length |