- Also called blind spot. an area in which radio or cell phone signals are weak and their reception poor.
- blind spot(def 4).
- Anatomy. a small area on the retina that is insensitive to light due to the interruption, where the optic nerve joins the retina, of the normal pattern of light-sensitive rods and cones.
- an area or subject about which one is uninformed, prejudiced, or unappreciative: I confess that operettas are my blind spot.
- dead spot(def 1).
- Also called dead spot. any part of an auditorium, arena, or the like, in which a person is unable to see or hear satisfactorily.
- an area to the side and slightly behind a driver's field of vision that is not reflected in the vehicle's rearview mirror.
Origin of blind spot
- a small oval-shaped area of the retina in which vision is not experienced. It marks the nonphotosensitive site of entrance into the eyeball of the optic nerveSee optic disc
- a place or area, as in an auditorium or part of a road, where vision is completely or partially obscured or hearing is difficult or impossible
- a subject about which a person is ignorant or prejudiced, or an occupation in which he or she is inefficient
- a location within the normal range of a radio transmitter with weak reception
Word Origin and History for dead-spot
1864, "spot within one's range of vision where yet one cannot see." Of flaws in the eye, from 1872; figurative sense in use by 1907.
- optic disk
- The area of blindness in the visual field corresponding to the optic disk.physiologic scotoma punctum cecum
- An area or facet of one's personality of which one remains ignorant or fails to gain understanding.mental scotoma scotoma
- The small region of the retina where fibers of the optic nerve emerge from the eyeball. The blind spot has no rods or cones, so no light or visual image can be transmitted.
Idioms and Phrases with dead-spot
Subject about which one is ignorant or biased. For example, The boss has a blind spot about Henry; he wouldn't fire him for anything, or Dad has a blind spot about opera; he can't see anything good about it. This term uses blind in the sense of “covered or hidden from sight.” It has two literal meanings: an insensitive part of the retina and an area outside one's field of vision. The phrase has largely replaced blind side, which survives mainly in the verb to blindside, meaning “to hit someone on an unguarded side” and “to deal an unexpected blow.” [Mid-1800s]