That mediates, that has the quality of mediating.
Early 19th century; earliest use found in Percy Bysshe Shelley (1792–1822), poet. From mediate + -ive.
英汉双解词典包含464360条英汉词条，基本涵盖了全部常用单词的翻译及用法，是英语学习的有利工具。