(anatomy) frontal and sphenoid

(US, Canada) A battery-powered hand-held light source. / A flashgun (device used to create flashes of light for photography). / (obsolete) A photograph taken with a flash camera.

A surname.

(organic chemistry) A complex nitrogenous hydrocarbon obtained artificially (as by the action of cyanogen chloride on aniline) as a white crystalline substance; diphenyl guanidin.