| Ehrlich-Turk line | Seldom-used term for the vertical, thin deposition of material on the posterior surface of the cornea in uveitis. (05 Mar 2000) |
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| Topinard's line | A line running between the glabella and the mental point. (05 Mar 2000) |
| trapezoid line | The area on the inferior surface of the clavicle near its lateral extremity on which the trapezoid ligament attaches. Synonym: linea trapezoidea, trapezoid ridge. (05 Mar 2000) |
| epiphysial line | The line of junction of the epiphysis and diaphysis of a long bone where growth in length occurs. Synonym: linea epiphysialis, synchondrosis epiphyseos. (05 Mar 2000) |
| established cell line | <cell culture> A cell line is a permanently established cell culture that will proliferate indefinitely given appropriate fresh medium and space. Lines differ from cell strains in that they have escaped the Hayflick limit and become immortalised. Some species, particularly rodents, give rise to lines relatively easily, whereas other species do not. No cell lines have been produced from avian tissues and the establishment of cell lines from human tissue is difficult. Many cell biologists would consider that a cell line is by definition already abnormal and that it is on the way towards becoming the culture equivalent of a neoplastic cell. (26 Mar 1998) |
| false Becke line | <microscopy> A second bright line which moves in the direction opposite to the Becke line. It is usually observed with thick particles or when the refractive index difference between particles and mountant is large. It appears as a concentration of reflected light at the high index side of the interface. (05 Aug 1998) |
| Ullmann's line | The line of displacement in spondylolisthesis. (05 Mar 2000) |
| Farre's line | A whitish line marking the insertion of the mesovarium at the hilum of the ovary. (05 Mar 2000) |
| Kilian's line | A transverse line marking the promontory of the pelvis. (05 Mar 2000) |
| Z line | <cell biology> The line formed where actin filaments attach between two sarcomeres. (11 May 1997) |
| Feiss line | A line running from the medial malleolus to the plantar aspect of the first metatarsophalangeal joint. (05 Mar 2000) |
| Lanz's line | A horizontal plane passing through the anterior superior iliac spines; it marks the boundary between the lateral and umbilical regions superiorly and the inguinal and pubic regions inferiorly. Synonym: planum interspinale, Lanz's line. (05 Mar 2000) |
| lateral line sense organ | A structure in fish consisting of a long groove or canal extending along each side of the trunk and tail and branching in the head region; the groove or tube is lined with neuroepithelial cells, some of which are in groups known as neuromasts; its function appears to be the detection of vibrations of low frequency. Synonym: neuromast organ. (05 Mar 2000) |
| lateral line system | A series of sense organs that detect pressure or vibrations along the head and side of cyclostomes, fishes, and some amphibians. (05 Mar 2000) |
| lead line | Deposits of lead sulfide in the gingiva in areas of chronic inflammation. (05 Mar 2000) |