A partial alienation of reason.
The tendency of light rays to preferentially strike the leading face of a moving object (the effect underlying the above phenomenon).
A typical development or structure; deviation from the normal type; an aberrant organ.
A defect in an image produced by an optical or electrostatic lens system.
The convergence to different foci, by a lens or mirror, of rays of light emanating from one and the same point, or the deviation of such rays from a single focus; a defect in a focusing mechanism that prevents the intended focal point.
A mental disorder, especially one of a minor or temporary character.
A small periodical change of the apparent positions of the stars and other heavenly bodies, due to the combined effect of the motion of light and the motion of the observer.
A deviation of a tissue, organ or mental functions from what is considered to be within the normal range.
The act of wandering; deviation from truth, moral rectitude; abnormal; divergence from the straight, correct, proper, normal, or from the natural state.
An instance of being irregular.
A violation of rules.
An object or event that is not regular or ordinary.
Irregular bowel movement (e.g. diarrhea or constipation).
The state or condition of being irregular, or the extent to which something is irregular.