0L (zero L) or 0-L may refer to:
0 longitude, or the prime meridian The zeroth law of thermodynamics Zero-length launch, in rocketry Zero in the Lebesgue measure Zero-lift axis, in aerodynamics Zero-lift drag coefficient Zero-length spring, a hypothetical type of spring The period between a person being accepted into law school and starting their first year of education (1L)
See also L0 (disambiguation) OL (disambiguation)