| transitional cell papilloma | <tumour> A benign papillary tumour of transitional epithelium; in the urinary tract, frequently called transitional cell carcinoma, grade 1, because of the likelihood of its recurrence. (05 Mar 2000) |
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| transitional convolution | A small convolution connecting two lobes or two main gyri in the depth of a sulcus. Synonym: annectent gyrus, transitional convolution. (05 Mar 2000) |
| transitional denture | A partial denture which is to serve as a temporary prosthesis to which teeth will be added as more teeth are lost, and which will be replaced after postextraction tissue changes have occurred; a transitional denture may become an interim denture when all of the teeth have been removed from the dental arch. (05 Mar 2000) |
| transitional element | <cell biology> Region at the boundary of the rough endoplasmic reticulum and the Golgi. Transport vesicles are responsible for the transfer of secretory proteins from this part of the rough endoplasmic reticulum to the Golgi system. (18 Nov 1997) |
| transitional epithelium | A highly distensible pseudostratified epithelium with large polyploid superficial cells that are cuboidal in the relaxed state but broad and squamous in the distended state; occurs in the kidney, ureter, and bladder. (05 Mar 2000) |
| transitional gyrus | A small convolution connecting two lobes or two main gyri in the depth of a sulcus. Synonym: annectent gyrus, transitional convolution. (05 Mar 2000) |
| transitional leukocyte | Old term for a monocyte. (05 Mar 2000) |
| transitional zone | The equatorial region of the lens of the eye where the anterior epithelial cells become transformed into lens fibres, that portion of a scleral contact lens between the corneal and scleral sections. (05 Mar 2000) |
| reticulum | Origin: L. Dim. Of rete a net. <anatomy> The second stomach of ruminants, in which folds of the mucous membrane form hexagonal cells; also called the honeycomb stomach. The neuroglia. Source: Websters Dictionary (01 Mar 1998) |
| reticulum cell | Cells of the reticuloendothelial system, found particularly in lymph nodes, bone marrow and spleen. In lymph nodes they are stromal cells and probably not reticuloendothelial cells in the current sense of that term. (18 Nov 1997) |
| reticulum cell sarcoma | <tumour> Obsolete term for histiocytic lymphoma. (05 Mar 2000) |
| reticulum trabeculare sclerae | The network of fibres (pectinate ligaments) at the iridocorneal angle between the anterior chamber of the eye and the venous sinus of the sclera; it contains spaces between the fibres that are involved in drainage of the aqueous humor, and is composed of two portions: the corneoscleral part, the part attached to the sclera, and the uveal part, the part attached to the iris. Synonym: reticulum trabeculare sclerae, Gerlach's valvula, Hueck's ligament, ligamentum annulare bulbi, pectinate ligaments of iridocorneal angle, pillar of iris, trabecular meshwork, trabecular network, trabecular zone. (05 Mar 2000) |
| Golgi internal reticulum | <cell biology> Intracellular stack of membrane bounded vesicles in which glycosylation and packaging of secreted proteins takes place. Part of the GERL complex. Synonym: Golgi body, Golgi vesicles, dictyosome (in plants), parabasal body (in flagellate protozoa). (11 Jan 1998) |
| cistern of cytoplasmic reticulum | See: cisterna. (05 Mar 2000) |
| corneoscleral part of trabecular reticulum | The anterior part of the trabecular reticulum, located between the sinus venosus sclerae, the scleral spur, and the posterior limiting membrane of the cornea. Synonym: pars corneoscleralis reticuli trabecularis. (05 Mar 2000) |