GMAT Vocabulary Flash Cards @ englishpdf.com and englishteststore.com File 021 advocacy (n) The act of pleading a cause advocate (n) One who pleads the cause of another, as in a legal or ecclesiastical court aerial (adj) Of, pertaining to, or like the air aeronaut (n) One who navigates the air, a balloonist aeronautics (n) the art or practice of flying aircraft aerostat (n) A balloon or other apparatus floating in or sustained by the air aerostatics (n) The branch of pneumatics that treats of the equilibrium, pressure, and mechanical properties aesthetic (adj) of beauty; pertaining to taste in art and beauty