astigmatism Syllabification: (a·stig·ma·tism)Pronunciation: /əˈstigməˌtizəm/Translate astigmatism | into Italian Definition of astigmatism noun a defect in the eye or in a lens caused by a deviation from spherical curvature, which results in distorted images, as light rays are prevented from meeting at a common focus. Derivatives astigmaticPronunciation: /ˌastigˈmatik/ adjective Origin: mid 19th century: from a-1 'without' + Greek stigma 'point' + -ismastigmatism in other Oxford dictionaries Definition of astigmatism in the British & World English dictionary
