An Etymological Dictionary of Astronomy and Astrophysics
English-French-Persian

The process of converting crude observational data into usable information for scientific interpretation, by correcting, rearranging, ordering, and simplifying.

→ data; → reduction.

Preliminary reduction of observational data at a telescope simultaneously with their acquisition.

→ on-line; → reduction.

1) In → data processing, the transformation of data from a "raw" form to some usable form.
2) Chem.: The removal of → oxygen from a substance, or the addition of → hydrogen to it. The term is also used more generally to include any reaction in which an atom gains → electrons.

Verbal noun of → reduce.