| Si | the most anterior point on the lower contour of the sella turcica [point]; silicon |
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| TP | temperature and pressure; temperature probe; temporal peak; temporoparietal; tension pneumothorax; t... |
| NPH | 1) Neutral Protamine Hagedorn Insulin = Isophane Insulin Susp... |
| ANRL | antihypertensive neutral renomedullary lipid |
| CANP | calcium-activated neutral protease |
| neutral oxide | An oxide that is neither an acid nor a base; e.g., water (hydrogen oxide, H2O). Synonym: indifferent oxide. (05 Mar 2000) |
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| neutral protease | <enzyme> Protease that is optimally active at neutral pH: See: proteases. (18 Nov 1997) |
| neutral reaction | PH of 7.00; H+ and OH- ion concentrations equal at 10-7 m at 22캜. Compare: dissociation constant of water. (05 Mar 2000) |
| neutral red | <chemical> 3-amino-7-dimethylamino-2-methylphenazine hydrochloride. A vital dye used as an indicator and biological stain. Various adverse effects have been observed in biological systems. Pharmacological action: dyes, indicators and reagents. Chemical name: 2,8-Phenazinediamine, N8,N8,3-trimethyl-, monohydrochloride (12 Dec 1998) |
| neutral spirits | Spirits distilled from suitable raw materials, are 95% ethanol (v/v) that is, at least 190 proof when distilled. Used for blending with straight whiskey and for making gin, cordials, liqueurs, and vodka. See: alcohol. Proof spirit, dilute alcohol, specific gravity 0.920, containing 49.5% by weight (57.27% by volume) of C2H5OH at 15.56캜. Originally in Great Britain it was the weakest alcohol that would permit ignition of gunpowder moistened with it. British proof spirit has a specific gravity of 0.9198 and contains 49.2% C2H5OH by weight, or 57.1% by volume at the temperature of 10.56캜. (05 Mar 2000) |
| neutral stain | <technique> A compound of an acid stain and a basic stain, such as the eosinate of methylene blue, in which the anion and cation each contains a chromophore group. Synonym: salt dye. (05 Mar 2000) |
| neutral stimulus | When paired with the unconditioned stimulus in simultaneous presentation to an organism, capable of eliciting a given response. (05 Mar 2000) |
| neutral zone | In dentistry, the potential space between the lips and cheeks on one side and the tongue on the other; natural or artificial teeth in this zone are subject to equal and opposite forces from the surrounding musculature. (05 Mar 2000) |
| day neutral plant | <botany> Plants that flower regardless of day length. (09 Oct 1997) |
| lens neutral proteinase | <enzyme> Degrades alpha 2-crystallin; requires ca and mg; cleaves phe-ser bond in bradykinin; similar enzyme found in human lung Registry number: EC 3.4.24.5 Synonym: neutral proteinase 24.5 (26 Jun 1999) |
| alveolar point | The most anterior point on the maxillary alveolar process in the midline. Synonym: alveolar point, prostheon. Origin: G. Ntr. Of prosthios, foremost (05 Mar 2000) |
| anterior focal point | The point where parallel rays from the retina are focused. (05 Mar 2000) |
| apophysial point | The centre of the root of the anterior nasal spine. Synonym: apophysary point, apophysial point, spinal point. (05 Mar 2000) |
| arrow point tracing | A tracing of mandibular movements made by means of a device attached to the opposing arches; its shape resembles that of an arrowhead or a Gothic arch, and when the instrument's marking point is at the apex of the arch, the jaws are considered to be in centric relation. Synonym: arrow point tracing, Gothic arch tracing, Gothic arch, stylus tracing. (05 Mar 2000) |
| auricular point | A craniometric point at the centre of the opening of the external acoustic meatus; or, in certain cases, the middle of the upper edge of this opening. Synonym: auricular point. Origin: L. Auricularis, pertaining to the ear (05 Mar 2000) |