(law) A legal doctrine by which the sovereign or state cannot commit a legal wrong and is immune from civil suit or criminal prosecution.

(law) A legal doctrine by which the royal sovereign or royally governed state cannot commit a legal wrong and is immune from civil suit or criminal prosecution.

(optics) The image formed by light rays converging from a convex lens or concave mirror

Used other than figuratively or idiomatically: see chemical, imbalance. / (euphemistic) Mental illness.

(immunology) The translocation of active humoral immunity from one individual to another in the form of custom-made antibodies.

plural of imaginary unit

(medicine) An impending miscarriage indicated by bleeding and pain along with an effaced cervix.

plural of imminent abortion

The transformation of multiple images onto a common coordinate system

Any of various reflections of objects within the structure of the eye.