Optional ReadonlyalternatesList of all known alternate spellings, abbreviations, etc.
Optional ReadonlyconversionConversion factor to base unit (ml for volume, g for mass, mm for length).
A number means the same factor applies to all systems.
An object with us, imperial, and/or metric keys means the factor differs by system.
ReadonlypluralFull name of the unit used when quantity is greater than one.
ReadonlyshortAbbreviation or short name for the unit.
Optional ReadonlytypeThe type of measurement (volume, mass, length, count, or other).
Unit of measure properties.
All properties are
readonly: the shipped unitsOfMeasure definitions are deep-frozen, so writing to one would throw at runtime.