| SAEB | sinoatrial entrance block |
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| ESD | Entrance surface dose |
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| entrance | 1. The act of entering or going into; ingress; as, the entrance of a person into a house or an apartment; hence, the act of taking possession, as of property, or of office; as, the entrance of an heir upon his inheritance, or of a magistrate into office. 2. Liberty, power, or permission to enter; as, to give entrance to friends. 3. The passage, door, or gate, for entering. "Show us, we pray thee, the entrance into the city." (Judg. I. 24) 4. The entering upon; the beginning, or that with which the beginning is made; the commencement; initiation; as, a difficult entrance into business. "Beware of entrance to a quarrel." "St. Augustine, in the entrance of one of his discourses, makes a kind of apology." (Hakewill) 5. The causing to be entered upon a register, as a ship or goods, at a customhouse; an entering; as, his entrance of the arrival was made the same day. 6. The angle which the bow of a vessel makes with the water at the water line. The bow, or entire wedgelike forepart of a vessel, below the water line. Origin: OF. Entrance, fr. OF. & F. Entrant, p. Pr. Of entrer to enter. See Enter. Source: Websters Dictionary (01 Mar 1998) |
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| entrance block | An incompletely understood mechanism whereby a pacemaker is protected from being discharged by the impulse from another centre; the mechanism, usually conceived as an encircling zone of unidirectionally refractory tissue permitting egress of impulses from the centre but preventing access to the centre, is seen in operation in ventricular parasystole where the parasystolic centre is protected from discharge by the sinus pacemaker and so is able to maintain its intrinsic rhythm undisturbed. Synonym: entrance block, protection. (05 Mar 2000) |
| entrance pupil | <microscopy> The apparent size of the limiting aperture of a lens or lens system (properly that of the diaphragm), as seen from the object plane. This can shift and become a complex matter in some circumstances. In a properly set up microscope system it should be that of the substage iris diaphragm. (05 Aug 1998) |
| entrance b. |
in cardiology, a unidirectional impasse to conduction that prevents an impulse from entering a specific region of excitable tissue; it is part of the mechanism underlying parasystole.
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| entrance | the act of entering |
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| entrance | something that provides access (entry or exit) |
| entrance | a movement into or inward |
| entrance | put into a trance |
| entrance | attract |
| entrance | examination to determine a candidate's preparation for a course of studies |
| entrance | examination to determine a candidate's preparation for a course of studies |
| entrance | the fee charged for admission |
| entrance | a large entrance or reception room or area |
| entrance | the fee charged for admission |
| entrance | filled with wonder and delight |
| entrance | a feeling of delight at being filled with wonder and enchantment |
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