Noun: nyctalopia ,nik-tu'low-pee-u
- Inability to see clearly in dim light; due to a deficiency of vitamin A or to a retinal disorder
"His nyctalopia made it difficult for him to drive at night";
- night blindness, moon blindness
Derived forms: nyctalopias
Type of: avitaminosis, hypovitaminosis, vision defect, visual defect, visual disorder, visual impairment
Encyclopedia: Nyctalopia