protrusionWiktionary 原文中文来自 ECDICTn.突出，突出部，露出演变路径（由近及远）英语源自 ←法语 protrusion原始词根原始印欧语 *trewd-词源说明From French protrusion.释义（英文）名词 Noun(uncountable) The act of protruding.(uncountable) The state of being protruded.(countable) Anything that protrudes.词族派生词（3）microprotrusionnanoprotrusionprotrusional相关词（1）protuberance