It's the study of the nature & behavior of light, & also the title of an Isaac Newton treatise
Opticks - Wikipedia  Opticks: Or, a Treatise of the Reflexions, Refractions, Inflexions and Colours of Light is a book ... Newton's name did not appear on the title page of the first edition of Opticks. ... Rather, the Opticks is a study of the nature of light and colour and the various phenomena of .... See also[edit]. Book icon. Book: Isaac Newton...
Blood disease | definition of blood disease by Medical dictionary  Looking for online definition of blood disease in the Medical Dictionary? ... the branch of medical science dealing with the blood and blood-forming tissues, ... of internal medicine that diagnoses and treats diseases of the blood and its cell...