quintation

== English == === Etymology === From quintate +‎ -ion. === Pronunciation === (Received Pronunciation, UK) enPR: kwĭntāʹshən, IPA(key): /kwɪnˈteɪʃən/ === Noun === quintation (countable and uncountable, plural quintations) (rare) The removal of one fifth (of something). ==== Coordinate terms ==== (proportionate reduction, by single aliquot part): septimation (1/7), decimation (1/10), vicesimation (1/20), tricesimation (1/30), centesimation (1/100)