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{{#category_index:L|L}} 1. Liter, a volume of 1000 cm3. 2. A surface wave; L stands for ‘‘long’’ waves. LQ (and Q) denotes a Love (Querwellen) wave, LR (and R) a Rayleigh wave. See wave notation. 3. The area above a decay curve from 0.45 to 1.75 s (induced-polarization usage):