BR Medical Abbreviation

British Region

Blocking Reaction

British Rowing

British rarity

British roots

bone resorption

baseline recovery

Birefringence

An optical property of all anisotropic crystals observed as light and dark areas while the sample is rotated on the microscope stage of a polarizing microscope. OR The refraction of light in an anisotropic material in two slightly different directions to form two rays. In optical coatings, birefringence creates a distortion of images seen through the optical piece, as well as a reflection or noticeable purple sheen on the surface of the optical piece.

Balbiani ring

A very large puff at a particular band on a polytene chromosome.

Bedside Rounds