extinct nuclide衰减核素
functionally extinct功能性灭绝;被认为已经功能灭绝
extinct language灭绝语;死语
extinct ecies灭绝的物种;已灭绝生物品种
extinct elements灭绝元素
ecological extinct生态灭绝
globally extinct全球灭绝
extinct metaphor已消亡的隐喻
ADJ（形容词） A species of animal or plant that is extinct no longer has any living members, either in the world or in a particular place. 绝种的
At the current rate of decline, many of the rain forest animals could become extinct in less than 10 years.
按照目前的下降速度，许多雨林动物不到十年就会绝种。
ADJ（形容词） If a particular kind of worker, way of life, or type of activity is extinct, it no longer exists, because of changes in society. 不复存在的
Herbalism had become an all but extinct skill in the Western world.
草药医术在西方世界几乎已成了一项绝迹的技术。
ADJ（形容词） An extinct volcano is one that does not erupt or is not expected to erupt anymore. 死的 (火山)
Its tallest volcano, long extinct, is Olympus Mons.
它最高的火山是已死很久的奥林匹斯山。