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astronomical units
unit operation
Any simple step in a multi-step chemical engineering process; examples include distillation, evaporation, mixing, filtration, crystallization etc.
base units
base unit
A unit of measurement which is not itself defined in terms of other units, and from which other units may be derived. / The main unit of a computer or hi-fi system.
unit fine
formula unit
(inorganic chemistry) An empirical formula of an ionic compound (that does not possess individual molecules) for use in stoichiometric calculations
effects unit
An electronic device that alters how a musical instrument or other audio source sounds.
united flower
(botany) A flower of a kind that has the stamens and pistils in the same flower.
federative unit
Any of the twenty-six states or the federal district of Brazil.
parental units
plural of parental unit