astigmatism

名词 n.
中文释义
美 /əˈstɪɡmətɪzm̩/

英文释义

名词 n.
  1. A defect of a lens such that light rays coming from a point do not meet at a focal point so that the image is blurred. countable,uncountable
  2. A disorder of the vision, usually due to a misshapen cornea, such that light does not focus correctly on the retina causing a blurred image. countable,uncountable

词形变化

astigmatisms plural

词汇关系

近义词
astigmia
衍生词
anisoastigmatism astigmatic astigmatically mixed astigmatism
相关词
stigma stigmatize emmetropia hyperopia myopia pointlessness

词源

From a- (negative prefix) + stem of Ancient Greek στίγμα (stígma, “mark, point”) + -ism. Coined by English polymath William Whewell in 1846.
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