(derogatory) Language used by political liberals; liberalese.

Relating to finches of the genus Coccothraustes

(chemistry) olefiant gas, or ethylene / (chemistry, by extension) any of the series of unsaturated hydrocarbons of which ethylene is a type

(tennis) An official who watches the lines of the court and judges whether the ball has landed in or out and also declares foot faults.