1
- a state of deep unconsciousness that lasts for a prolonged or indefinite period, caused especially by severe injury or illness昏迷：
a road crash left him in a coma.
一次公路上的碰撞事故使他昏了过去。
1.1
- humorous a state of extreme exhaustion, lethargy, or sleepiness〈幽默〉疲惫; 无精打采, 懒散; 昏昏欲睡。
词源
mid 17th cent.: modern Latin, from Greek kōma 'deep sleep'; related to koitē 'bed' and keisthai 'lie down'.
(pl. comae /-miː/ )
1- Astronomy a diffuse cloud of gas and dust surrounding the nucleus of a comet【天文】彗发。
1.1
- mass noun Optics aberration which causes the image of an off-axis point to be flared like a comet【光学】彗形像差。
词源
early 17th cent. (as a botanical term)： via Latin from Greek komē 'hair of the head'.