| spatia intervaginalia nervi optici | <anatomy, nerve> The spaces within the internal sheath of the optic nerve, between the arachnoidal and pial layers, filled with cerebrospinal fluid and continuous with the subarachnoid space. Synonym: spatia intervaginalia nervi optici, intersheath spaces of optic nerve, Schwalbe's spaces. (05 Mar 2000) |
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| spatia zonularia | The spaces between the fibres of the ciliary zonule at the equator of the lens of the eye. Synonym: spatia zonularia, Petit's canals. (05 Mar 2000) |
| spatial | Relating to space or a space. (05 Mar 2000) |
| spatial acuity | The detection of the shape of a test object; e.g., perceiving polygons of the same size but with different numbers of sides. (05 Mar 2000) |
| spatial behaviour | Reactions of an individual or groups of individuals with relation to the immediate surrounding area including the animate or inanimate objects within that area. (12 Dec 1998) |
| spatial filter | <radiobiology> Device consisting of a lens pair and a pinhole aperture stop. Intensity fluctuations over the spatial extent of a laser beam are removed by passing the focused beam through the aperture stop. The pinhole must be placed in a vacuum to prevent air breakdown by the focused beam. These filters are used to counter the effects caused by self-focusing. (09 Oct 1997) |
| spatial formula | A chemical formula in which the arrangement of the atoms or atomic groupings in space are indicated. Synonym: spatial formula. (05 Mar 2000) |
| spatial localization | The reference of a visual sensation to a definite locality in space. (05 Mar 2000) |
| spatial sensing | Mechanism of sensing a gradient in which the signal is compared at different points on the cell surface and cell movement directed accordingly. Translocation of all or part of the cell is not required. See: temporal gradient sensing, pseudospatial gradient sensing. (18 Nov 1997) |
| spatial vector | A cardiac vector represented in more than one plane simultaneously; two-or three-dimensional orientation of a vector. (05 Mar 2000) |
| spatial vectorcardiography | Three-dimensional vectorcardiography in which vector loops are inscribed in frontal, sagittal, and horizontal planes. (05 Mar 2000) |
| spatium | Synonym: space. Origin: L. (05 Mar 2000) |
| spatium episclerale | The space between the fascial sheath of the eyeball and the sclera. Synonym: spatium episclerale, interfascial space, spatium interfasciale, spatium intervaginale bulbi oculi, Tenon's space. (05 Mar 2000) |
| spatium intercostale | An interval between the ribs, occupied by intercostal muscles, veins, arteries and nerves. Synonym: spatium intercostale. (05 Mar 2000) |
| spatium interfasciale | The space between the fascial sheath of the eyeball and the sclera. Synonym: spatium episclerale, interfascial space, spatium interfasciale, spatium intervaginale bulbi oculi, Tenon's space. (05 Mar 2000) |