| exist | 1. To be as a fact and not as a mode; to have an actual or real being, whether material or spiritual. "Who now, alas! no more is missed Than if he never did exist." (Swift) "To conceive the world . . . To have existed from eternity." (South) 2. To be manifest in any manner; to continue to be; as, great evils existed in his reign. 3. To live; to have life or the functions of vitality; as, men can not exist water, nor fishes on land. Synonym: See Be. Origin: L. Existere, exsistere, to step out or forth, emerge, appear, exist; ex out + sistere to cause to stand, to set, put, place, stand still, fr. Stare to stand: cf. F. Exister. See Stand. Source: Websters Dictionary (01 Mar 1998) |
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| existence | 1. The state of existing or being; actual possession of being; continuance in being; as, the existence of body and of soul in union; the separate existence of the soul; immortal existence. "The main object of our existence." (Lubbock) 2. Continued or repeated manifestation; occurrence, as of events of any kind; as, the existence of a calamity or of a state of war. "The existence therefore, of a phenomenon, is but another word for its being perceived, or for the inferred possibility of perceiving it." (J. S. Mill) 3. That which exists; a being; a creature; an entity; as, living existences. Origin: Cf. F. Existence. Source: Websters Dictionary (01 Mar 1998) |
| existential | Pertaining to a branch of philosophy, existentialism, concerned with the search for the meaning of one's own existence, that has been extended into existential psychotherapy. Origin: L. Existentia, existence (05 Mar 2000) |
| existential psychiatry | A type of therapy, based on existential philosophy, emphasizing confrontation, primarily spontaneous interaction, and feeling experiences rather than rational thinking, with less attention given to patient resistances; the therapist is involved on the same level and to the same degree as the patient. Synonym: existential psychiatry. (05 Mar 2000) |
| existential psychology | A theory of psychology, based on the philosophies of phenomenology and existentialism, which holds that the proper study of psychology is an individual's experience of the sequence, spatiality, and organization of his or her existence in the world. (05 Mar 2000) |
| existential psychotherapy | A type of therapy, based on existential philosophy, emphasizing confrontation, primarily spontaneous interaction, and feeling experiences rather than rational thinking, with less attention given to patient resistances; the therapist is involved on the same level and to the same degree as the patient. Synonym: existential psychiatry. (05 Mar 2000) |
| existentialism | A philosophical doctrine basic to existential psychology or existential psychiatry. It focuses on the individual's subjective awareness of his style of existence, his intimate interaction with himself, and his environment. (12 Dec 1998) |
| exit block | Inability of an impulse to leave its point of origin, the mechanism for which is conceived as an encircling zone of refractory tissue denying passage to the emerging impulse. (05 Mar 2000) |
| exit domain | <molecular biology> One of the two main binding sites on the ribosome molecule. The finished portion of the polypeptide being translated is attached to this site and leaves the ribosome from this site when the entire polypeptide is finished. (09 Oct 1997) |
| exit dose | The exposure dose of radiation leaving a body opposite the portal of entry. (05 Mar 2000) |
| exit pupil | <microscopy> The exit pupil of a lens system is an image of the entrance pupil (hence conjugate to it) and normally should be the image of the limiting diaphragm. In both the microscope and the telescope it is the eyepoint where the beam has its smallest cross-section. It is also called the Ramsden circle or eyepoint. (05 Aug 1998) |
| exitus | An exit or outlet; death. Origin: L. Fr. Ex-eo, pp. -itus, to go out (05 Mar 2000) |
| Exner's plexus | A plexus formed by tangential nerve fibres in the superficial plexiform or molecular layer of the cerebral cortex. (05 Mar 2000) |
| Exner, Siegmund | <person> Austrian physiologist, 1846-1926. See: Call-Exner bodies, Exner's plexus. (05 Mar 2000) |
| exo- | Exterior, external, or outward. See: ecto-. Origin: G. Exo, outside (05 Mar 2000) |