Turbit definition, one of a breed of domestic pigeons having a stout, roundish body, a short head and beak, and a ruffled breast and neck. See more. Dictionary.com
The anterior angle. Lesions that involve the anterior angle of the chiasm, the point at which the optic nerve passes into and forms the chiasm, may show a junctional scotoma (Traquair, 1949) since there is at this point separation of the crossing and uncrossed fibers.
1 When a disease or lesion affects the optic nerve before it reaches the optic chiasm in the brain, the defect in the the vision will show up on only one side or one eye and can affect the entire field of that eye.  Diseases that cause damage to the optic chiasm cause a bitemporal visual field defect. A bitemporal visual field defect is a decrease or absence of vision on the temporal half or side of the field of vision in each eye.