noun
Usage: usually capitalized L
Etymology: after Edmond Landolt died 1926 French ophthalmologist
: one of a series of incomplete rings or circles used in studying visual discrimination or acuity
noun
Usage: usually capitalized L
Etymology: after Edmond Landolt died 1926 French ophthalmologist
: one of a series of incomplete rings or circles used in studying visual discrimination or acuity
Webster's New International English Dictionary. Новый международный словарь английского языка Webster. 2012