(chemistry) A specific arrangement of atoms that repeats within a macromolecule / (genetics) A specific sequence of bases that repeats within a nucleic acid (or of amino acids within a protein)

plural of astronomical unit

Any simple step in a multi-step chemical engineering process; examples include distillation, evaporation, mixing, filtration, crystallization etc.

plural of 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.

A day fine.

(inorganic chemistry) An empirical formula of an ionic compound (that does not possess individual molecules) for use in stoichiometric calculations

An electronic device that alters how a musical instrument or other audio source sounds.

Any of the twenty-six states or the federal district of Brazil.

plural of parental unit