| Tenon's space | 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) |
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| thenar space | The more medial of the central palmar spaces, bounded medially by the hypothenar compartment; related distally to the synovial tendon sheaths of digits 3 and 4 and proximally to the common flexor sheath. Synonym: medial midpalmar space, middle palmar space. (05 Mar 2000) |
| Traube's semilunar space | A crescentic space about 12 cm wide, bounded medially by the left border of the sternum, above by an oblique line from the sixth costal cartilage to the lower border of the eighth or ninth rib in the mid-axillary line and below by the costal margin; the percussion tone here is normally tympanitic, because of the underlying stomach, but is modified by pulmonary emphysema, a pleural effusion, or an enlarged spleen. (05 Mar 2000) |
| Trautmann's triangular space | The area of the temporal bone bounded by the sigmoid sinus, the superior petrosal sinus, and a tangent to the posterior saemicircular canal. (05 Mar 2000) |
| epidural space | Space between the dura mater and the walls of the vertebral canal. (12 Dec 1998) |
| episcleral space | 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) |
| epitympanic space | The upper portion of the tympanic cavity above the tympanic membrane; it contains the head of the malleus and the body of the incus. Synonym: recessus epitympanicus, attic, epitympanic space, epitympanum, Hyrtl's epitympanic recess, tympanic attic. (05 Mar 2000) |
| extracellular space | Interstitial space between cells, occupied by fluid as well as amorphous and fibrous substances. (12 Dec 1998) |
| Kiernan's space | Interlobular space in the liver. (05 Mar 2000) |
| united states national aeronautics and space administration | An independent federal agency established in 1958. It conducts research for the solution of problems of flight within and outside the earth's atmosphere and develops, constructs, tests, and operates aeronautical and space vehicles. (12 Dec 1998) |
| Kretschmann's space | A slight depression in the epitympanic recess below the superior recess of tympanic membrane. (05 Mar 2000) |
| filtration space | |
| freeway space | The space between the occluding surfaces of the maxillary and mandibular teeth when the mandible is in physiologic resting position. Synonym: interocclusal clearance, interocclusal distance, interocclusal gap, interocclusal rest space. (05 Mar 2000) |
| leeway space | The difference between the combined mesiodistal widths of the deciduous cuspids and molars and their successors. (05 Mar 2000) |
| lymph space | A space, in tissue or a vessel, filled with lymph. (05 Mar 2000) |