| perichoroidal space | The interval between the choroid and the sclera filled by the loose meshes of the lamina fusca of sclera and the suprachoroid lamina. Synonym: spatium perichoroideale, perichoroid space. (05 Mar 2000) |
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| perichoroid space | The interval between the choroid and the sclera filled by the loose meshes of the lamina fusca of sclera and the suprachoroid lamina. Synonym: spatium perichoroideale, perichoroid space. (05 Mar 2000) |
| perilymphatic space | Space between the bony and membranous portions of the labyrinth. Synonym: spatium perilymphaticum, cisterna perilymphatica. (05 Mar 2000) |
| perinuclear space | <cell biology> Gap 10-40 nm wide separating the two membranes of the nuclear envelope. (18 Nov 1997) |
| peripharyngeal space | The space, filled with loose areolar tissue, around the pharynx; it is divided into two portions, lateral pharyngeal spatium and retropharyngeal spatium. Synonym: spatium peripharyngeum. (05 Mar 2000) |
| periplasmic space | Structureless region between the plasma membrane and the cell wall of gram-negative bacteria. (18 Nov 1997) |
| periportal space of Mall | A tissue space between the limiting lamina and the portal canal in the liver. (05 Mar 2000) |
| perisinusoidal space | The potential extravascular space between the liver sinusoids and liver parenchymal cells. Synonym: Disse's space. (05 Mar 2000) |
| perivitelline space | The space between the vitelline membrane and the zona pellucida, appearing in an ovum immediately following fertilization. (05 Mar 2000) |
| personal space | Invisible boundaries surrounding the individual's body which are maintained in relation to others. (12 Dec 1998) |
| pharyngeal space | The area occupied by the pharynx (naso-, oro-, and laryngopharnynx). Not to be confused with the retropharyngeal space. (05 Mar 2000) |
| pharyngomaxillary space | The space limited by the lateral wall of the pharynx, the cervical vertebrae, and the medial pterygoid muscle. Synonym: parapharyngeal space. (05 Mar 2000) |
| middle palmar 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) |
| midpalmar space | Either of the two central palmar spaces (medial or lateral). (05 Mar 2000) |
| Cloquet's space | A space between the ciliary zonule and the vitreous body. (05 Mar 2000) |