penumbra
中文来自 ECDICT
- n.
- 半影，明暗交界部分，边缘部分，周围的气氛
演变路径（由近及远）
词源说明
From New Latin pēnumbra, from Latin paene (“almost”) + umbra (“shadow”).
释义（英文）
名词 Noun
- A partially shaded area around the edges of a shadow, especially an eclipse.
- (astronomy) A region around the edge of a sunspot, darker than the sun's surface but lighter than the middle of the sunspot.
- (figuratively) An area of uncertainty or intermediacy between two mutually exclusive states or categories.
- (figuratively) An area that lies on the edge of something; a fringe.
- Something related to, connected to, and implied by, the existence of something else that is necessary for the second thing to be full and complete in its essential aspects.
- (medicine, preceded by "ischaemic", after a stroke) A region of the brain that has lost only some of its blood supply, and retains structural integrity but has lost function.
词族
派生词（2）