as·tig·mom·e·ter \ˌa(ˌ)stigˈmäməd.ə(r), ˌastēg-\noun orastig·ma·tom·e·ter\əˌstigməˈtäməd.ə(r), aˌs-\ (-s) Etymology: International Scientific Vocabulary astigmo-, astigmato- (from astigmatism) + -meter; originally formed as French astigmomètre : an apparatus for measuring the degree of astigmatism • as·tig·mom·e·try\ˌaˌstigˈmämətrē, -i\noun-es