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Symbol | Definition |
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≡ | exactly equal |
≈ | approximately equal to |
= | equal to |
digits | indicates that digits repeat infinitely (e.g. 8.294 369 corresponds to 8.294 369 369 369 369 …) |
Lambda (written λ, in lowercase) is a legitimate metric unit of volume equal to 10−9 m3, 1 cubic millimeter (mm3) or 1 microlitre (µL). Introduced by the BIPM in 1880, the lambda has been used in chemistry and in law for measuring volume, but its use is not recommended.
The minim (abbreviated min, ♏, or ) is a unit of volume in both the imperial and US customary systems of measurement. Specifically it is 1⁄60 of a fluidram or 1⁄480 of a fluid ounce. In the pharmacopeoia, it is also noted that the minim was originally created by Mr. Timothy Lane, F.R.S, as 61440 parts per wine gallon.