1. <abbreviation> Left (e.g., left eye); lumbar vertebra (L1 to L5).
2. Symbol for inductance; litre; leucine; linking number.
3. Used with a lower case letter, plus sign, subscript letter, or subscript plus sign as a symbol for various doses of toxin.
4. Levorotatory, a prefix indicating a chemical compound to be structurally (sterically) related to l-glyceraldehyde.
Compare: d-.
(21 Jun 2000)