(organic chemistry) A dark purple to black crystalline solid having four phenyl rings that are rotated out of the plane compared to the central ring because of steric repulsion.

simple past tense and past participle of doublecheck

present participle of stage whisper Alternative spelling of stage-whispering

(medicine) One of the bands of immunoglobulins that are seen when a patient's blood plasma or cerebrospinal fluid (CSF) is analyzed.