skəˈtōmə, skōˈ- noun
( plural scotomas -məz ; or scotomata -məd.ə)
Etymology: New Latin scotomat-, scotoma, from Medieval Latin, dimness of vision, from Greek skotōmat-, skotōma, from skotoun to darken, blind, from skotos darkness — more at shade
: a blind or dark spot in the visual field