AXIS n.
xis of a crystal, the direction in which a ray of transmitted light suffers no double refraction. All crystals, not of the isometric system, are either uniaxial or biaxial. -- Optic axis, Visual axis (Opt.), the straight line passing through the center of the pupil, and perpendicular to the surface of the eye. -- Rad…
BACK n. 3 definitions
-- To put, or get, one's back up, to assume an attitude of obstinate resistance (from the action of a cat when attacked.). [Colloq.] -- To see the back of, to get rid of. -- To turn the back, to go away; to flee. -- To turn the back on one, to forsake or neglect him.
BALANCE n.
e, with a poised beam, which indicates, by weights suspended from one arm, the mutual attraction of oppositely electrified surfaces. Knight. -- Balance fish. (Zoöl) See Hammerhead. -- Balance knife, a carving or table knife the handle of which overbalances the blade, and so keeps it from contact with the table. -- B…