Axin

(aksf-in). A fatty and varnish-like substance produced in Mexico by an insect, Coccus axinus. It is used in the arts and locally in medicine, ieing regarded as a good vulnerary and resolvent. (aks'-is). I. An imaginary line ia ing through the center of a body. 2. The second:ervical vertebra. A., Basicranial, in craniometry, a ine drawn from the basion to the middle of the anterior irder of the cerebral surface of the sphenoid bone.., Bas i facial, in craniometry, a line drawn from the iterior border of the cerebral surface of the sphenoid the alveolar point. A., Bin auricular, in craniometry, the imaginary line joining the two auricular points. A., Cerebrospinal, the central nervous system. A. Cylinder (of a nerve), the conducting or e ential part of a nerve lying in the center and surrounded by the sheath of Schwann. It is also called the axis-cylinder of Purkinje. A., Frontal (of the eye), an imaginary line running through the eyeball from right to left, and corresponding with the movements of elevation and depre ion of the eyeball. A., Optic, the line from the corneal apex to the macula lutea. A., Optical, an imaginary line pa ing from the center of the eye-piece of a microscope through the body, objective, stage and sub-stage, to the mirror. A., Sagittal (of the eye), an imaginary line running through the eyeball from before backward, and coinciding with the line of vision. A., Visual, the line from the object through the nodal point to the macula.