deuteranopia
noun
deu·ter·an·opia ˌdü-tə-rə-ˈnō-pē-ə 
also ˌdyü-
: color blindness marked by usually complete loss of ability to distinguish colors
deuteranopic
ˌdü-tə-rə-ˈnō-pik
adjective -ˈnä-pik
also ˌdyü-
Example Sentences
Recent Examples on the Web Red-green color blindness is broadly organized into four types, protanomaly, protanopia, deuteranomaly, and deuteranopia, all of which have to do with how the cones in the eye function. 
Fernando Alfonso Iii, Houston Chronicle, 19 Dec. 2017 One of these is for players with normal vision; the other three cater to those with protanopia, deuteranopia and tritanopia (which correspond to people’s difficulties sensing red, green and blue light respectively). The Economist, 30 Sep. 2017 The most common type of colour blindness, for example, is deuteranopia. The Economist, 30 Sep. 2017
Fernando Alfonso Iii, Houston Chronicle, 19 Dec. 2017 One of these is for players with normal vision; the other three cater to those with protanopia, deuteranopia and tritanopia (which correspond to people’s difficulties sensing red, green and blue light respectively). The Economist, 30 Sep. 2017 The most common type of colour blindness, for example, is deuteranopia. The Economist, 30 Sep. 2017 Word History
Etymology
New Latin, from deuter- + a- entry 2 + -opia; from the blindness to green, regarded as the second primary color
First Known Use
circa 1901, in the meaning defined above
Medical Definition
deuteranopia
noun
deu·ter·an·opia ˌd(y)üt-ə-rə-ˈnō-pē-ə
: color blindness marked by usually complete loss of ability to distinguish colors