scotoma
/skɒˈtəʊmə/noun
(pl. scotomas或scotomata /-mətə/)
- Medicine a partial loss of vision or blind spot in an otherwise normal visual field【医】盲点; 暗点。
词源
mid 16th cent. (denoting dizziness and dim vision)：via late Latin from Greek skotōma, from skotoun 'darken'， from skotos 'darkness'.