radar-absorbent material
/ˈɹeɪdɑːɹɐbsˈɔːbənt mətˈiəɹiəl/
n
中文：雷达吸波材料
中文 · 雷达吸波材料Español · material que absorbe las ondas radarFrançais · matériau absorbant les ondes radars
Meaning：Material that absorbs radar waves before they strike any metal part of the aircraft in order to muffle the sound of the echo.