| His' perivascular space | A tunnel-like extension of the subarachnoid space surrounding blood vessels that pass into the brain or spinal cord from the subarachnoid space; the lining of the channel is composed of pia and glial feet of astrocytes; a continuation of the space around capillaries and nerve cells probably does not occur. Synonym: His' perivascular space. (05 Mar 2000) |
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| pterygomandibular space | The area between the mandibular ramus and the pterygoid process of the sphenoid bone. (05 Mar 2000) |
| space | 1. Extension, considered independently of anything which it may contain; that which makes extended objects conceivable and possible. "Pure space is capable neither of resistance nor motion." (Locke) 2. Place, having more or ess extension; room. "They gave him chase, and hunted him as hare; Long had he no space to dwell [in]" (R. Of Brunne) "While I have time and space." (Chaucer) 3. A quantity or portion of extension; distance from one thing to another; an interval between any two or more objects; as, the space between two stars or two hills; the sound was heard for the space of a mile. "Put a space betwixt drove and drove." (Gen. Xxxii. 16) 4. Quantity of time; an interval between two points of time; duration; time. "Grace God gave him here, this land to keep long space." "Nine times the space that measures day and night." (Milton) "God may defer his judgments for a time, and give a people a longer space of repentance." (Tillotson) 5. A short time; a while. "To stay your deadly strife a space." 6. Walk; track; path; course. "This ilke [same] monk let old things pace, And held after the new world the space." (Chaucer) 7. A small piece of metal cast lower than a face type, so as not to receive the ink in printing, used to separate words or letters. The distance or interval between words or letters in the lines, or between lines, as in books. Spaces are of different thicknesses to enable the compositor to arrange the words at equal distances from each other in the same line. 8. One of the intervals, or open places, between the lines of the staff. Absolute space, Euclidian space, etc. See Absolute, Euclidian, etc. Space line, a fine, thin, short metal rule of the same height as the type, used in printing short lines in tabular matter. Origin: OE. Space, F. Espace, from L. Spatium space; cf. Gr. To draw, to tear; perh. Akin to E. Span. Cf. Expatiate. Source: Websters Dictionary (01 Mar 1998) |
| space adaptation syndrome | <syndrome> Alterations in normal physiology that occur during prolonged exposure to weightlessness, unless preventive measures are taken. Characterised by muscle atrophy, loss of mineral from bones, cardiovascular changes, etc. (05 Mar 2000) |
| space flight | Travel beyond the earth's atmosphere. (12 Dec 1998) |
| space frame | Three-dimensional optical bench that holds laser components stable from vibrational and thermal excursions. (09 Oct 1997) |
| space maintainer | <dentistry> A gadget used to maintain a space in your mouth. You would use a space maintainer when you lose one of your baby teeth. The space maintainer will keep a space in your mouth until a permanent tooth comes in to fill the space. (08 Jan 1998) |
| space medicine | The field of medicine concerned with physiologic diseases or disturbances resulting from the unique conditions of space travel. (05 Mar 2000) |
| space motion sickness | Disorder characterised by nausea, vomiting, and dizziness, possibly in response to vestibular disorientation or fluid shifts associated with space flight. (12 Dec 1998) |
| space nerve | <anatomy, nerve> One of the branches of the vestibulocochlear nerve distributed to the saemicircular canals. (05 Mar 2000) |
| space of Donders | The space between the dorsum of the tongue and the hard palate when the mandible is in rest position following the expiratory cycle of respiration. (05 Mar 2000) |
| space perception | The awareness of the spatial properties of objects; includes physical space. (12 Dec 1998) |
| space retainer | <dentistry> A gadget used to maintain a space in your mouth. You would use a space maintainer when you lose one of your baby teeth. The space maintainer will keep a space in your mouth until a permanent tooth comes in to fill the space. (08 Jan 1998) |
| space sense | The faculty of perceiving the relative positions of objects in the external world. (05 Mar 2000) |
| space sickness | Dizziness as result of changes in inner ear resulting from absence of gravity. Synonym: physiologic vertigo. (05 Mar 2000) |