blind spot

Short definition from Wiktionary

Noun

1. 1
   The place where the optic nerve attaches to the retina, and so where the retina cannot detect light; the portion of the visual field that corresponds to this site.
2. 2
   Any portion of the visual field in which the vision is impaired (by ocular disease).
3. 3
   In driving, the part of the road that cannot be seen in the rear-view mirror or side-view mirror.
4. 4
   The part of the railway/tramway track that cannot be seen in the side mirror or the side window.
5. 5
   In a stadium or auditorium, any location affording those seated or standing there only an obstructed visual or auditory experience.
6. 6
   An inability to recognize a fact or think clearly about a certain topic, especially because of a prejudice.
7. 7
   A subject or area about which one is uninformed or misinformed, often because of a prejudice or lack of appreciation.
8. 8
   A location where radio reception and/or transmission is significantly poorer than in surrounding locations.
9. 9
   A location around an earthquake epicentre that is prone to earthquake.
10. 10
    The flaw of building that cannot be seen when collapsing because poor structure, built not according specified standards, or not earthquake-proof.