# Formula Symbols - L

Written by Jerry Ratzlaff. Posted in Nomenclature & Symbols for Engineering, Mathematics, and Science

SymbolGreek SymbolDefinitionUSMetric
$$La$$ - Laplace number dimensionless number dimensionless number
$$d$$ - length $$ft$$ $$m$$
$$l$$ - length $$ft$$ $$m$$
$$\Delta l$$ delta length differential - -
$$l_d$$ - length differential - -
$$Le$$ - Lewis number dimensionless number dimensionless number
$$C_L$$ - lift coefficient dimensionless number dimensionless number
$$L$$ - lift force - -
$$C_L$$ - lift number dimensionless number dimensionless number
$$c$$ - light (vacuum) $$ft/sec$$ $$m/s$$
$$\alpha_l$$ alpha linear thermal expansion coefficient $$in$$ -
$$\chi$$ chi Lockhart-Martinelli parameter dimensionless number dimensionless number
$$LMTD$$ - logarithmic mean temperature differential - -
$$K$$ - loss coefficient - -
$$L$$ - luminosity - $$W$$