| PI | first meiotic prophase; isoelectric point; pacing impulse; package insert; pancreatic insufficiency;... |
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| NVL | no visible lesion |
| VID | visible iris diameter |
| VIS | vaginal irrigation smear; venous insufficiency syndrome; vertebral irritation syndrome; visible; vis... |
| UV/VIS | Ultraviolet, visible |
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| VPI | Visible Plaque Index |
| VLC | Visible light cured |
| VL | visible light |
| visible | 1. Perceivable by the eye; capable of being seen; perceptible; in view; as, a visible star; the least spot is visible on white paper. "Maker of heaven and earth, and of all things visible and invisible." (Bk. Of Com. Prayer) "Virtue made visible in outward grace." (Young) 2. Noticeable; apparent; open; conspicuous. "The factions at court were greater, or more visible, than before." (Clarendon) Visible church, the apparent church of Christ on earth; the whole body of professed believers in Christ, as contradistinguished from the invisible, or real, church, consisting of sanctified persons. Visible horizon. Same as Apparent horizon, under Apparent. Vis"ibleness, Vis"ibly. Origin: L. Visibilis, fr. Videre, visum, to see: cf. F. Visible. See Vision. Source: Websters Dictionary (01 Mar 1998) |
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| visible light | <physics> Electromagnetic radiation with wavelengths between 400 nanometres and 750 nanometres. Electromagnetic radiation within this range can be detected by the human eye. Colours depend on the wavelength lengths, a short wavelength (the 400 nm side) looks blue and a long wavelength (the 750 nm side) looks red. (09 Oct 1997) |
| visible spectrum | That part of electromagnetic radiation that is visible to the human eye; it extends from extreme red, 7606 A |
| prophase | Classical term for the first phase of mitosis or of one of the divisions of meiosis. During this phase the chromosomes condense and become visible. (18 Nov 1997) |
| prophase i | The first stage in the first meiotic division of meiosis. The individual chromosomes of the cell become clearly visible within the nucleus with a light microscope as they condense from long, thin, wispy structures to thick structures, and they appear as a tangled jumble of paired, identical chromatids. Prophase ends with the disappearance of the nuclear membrane. This is identical to the prophase stage of mitosis. (09 Oct 1997) |
| prophase II | The first stage in the second meiotic division of meiosis, following telophase I. In each of the two cells which were produced by the first meiotic division, the chromosomes migrate towards the cells centre. The stage ends when the chromosomes are aligned along a single plane in the centre of each cell. (09 Oct 1997) |
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