An act or effort made in the pursuit of knowledge, A literary work treating a particular subject or character, The mental effort of understanding, appreciating, and assimilating anything, especially a book; the earnest and protracted examination of a question, by reflection, collection and scrutiny of evidence, and otherwise; the pursuit of learning, intransitive verb_ To give careful thought to; contemplate, Medicine To perform a diagnostic test on (a part of the body, for example), To pursue a course of study

Serving to identify a particular disease; characteristic, characteristic of a particular disease, concerned with diagnosis; used for furthering diagnosis, noun_ The mark or symptom by which one disease is known or distinguished from others, A symptom or a distinguishing feature serving as supporting evidence in a diagnosis, An instrument or technique used in medical diagnosis