COMMUNICATIONS RETINAL CYSTS ANDRETINOSCHISIS* BY C. G. KEITH DepartmentofPathology, Institute ofOphthalmology, University ofLondon SINCE the term retinoschisis came into commonophthalmological parlance, it has oftenbeenusedas thoughthe conditionwereadefinite entity, differing fromretinal cysts bythe process byWhichit arose.
The definition of imperative is something that has authority or is absolutely necessary. 1  An example of imperative is the power that a government has over its people.  An example of imperative is the decision to give a cesarean in a breach birth.
Definition of Categorical Imperative. Noun. A moral obligation or duty that is universally binding and unconditional. Origin. Late 1700s Kantâs âCritique of Practical Reason,â (1788) and âGroundwork of the Metaphysics of Moralsâ (1785) History of Categorical Imperative Defined and Explained with Examples.  is a moral obligation or duty that is universally binding and unconditional. Legal Dictionary