| Clapton's line | A greenish discoloration of the marginal gingiva in cases of chronic copper poisoning. (05 Mar 2000) |
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| M line | <cell biology> Central part of the A band of striated muscle (and of the M band): contains M line protein (myomesin, 165 kD), creatine kinase (40 kD) and glycogen phosphorylase b (90 kD). Involved in controlling the spacing between thick filaments. (18 Nov 1997) |
| PICC line | <equipment> A catheter inserted into an arm vein and used for periods of up to three months. This catheter does not need to be surgically implanted and can be inserted at home by a trained nurse. (09 Oct 1997) |
| Wegner's line | A narrow, whitish, slightly curved line representing an area of preliminary calcification at the junction of the epiphysis and diaphysis of a long bone, related to syphilitic epiphysitis. (05 Mar 2000) |
| Monro-Richter line | A line passing from the umbilicus to the anterior superior iliac spine. McBurney's point occurs on this line. Synonym: Monro's line, Richter-Monro line. (05 Mar 2000) |
| Monro's line | A line passing from the umbilicus to the anterior superior iliac spine. McBurney's point occurs on this line. Synonym: Monro's line, Richter-Monro line. (05 Mar 2000) |
| pleuroesophageal line | On a frontal chest radiograph, the image of the interface between the right lung and oesophagus, the boundary of the azygoesophageal recess. (05 Mar 2000) |
| Conradi's line | A line extending from the base of the ensiform cartilage to the apex beat of the heart, corresponding approximately to the lower edge of the cardiac area. (05 Mar 2000) |
| Poirier's line | A line extending from the nasion to the lambda. (05 Mar 2000) |
| Correra's line | On a chest radiograph, the shadow of the soft tissues between the aerated lung and the bones of the thorax. Synonym: Correra's line. (05 Mar 2000) |
| mylohyoid line | A ridge on the inner surface of the mandible running from a point inferior to the mental spine upward and backward to the ramus behind the last molar tooth; it gives attachment to the mylohyoid muscle and the lowermost part of the superior constrictor of the pharynx. Synonym: linea mylohyoidea, internal oblique line, mylohyoid ridge. (05 Mar 2000) |
| costoclavicular line | A vertical line equidistant from the sternal and midclavicular lines. Synonym: linea parasternalis, costoclavicular line. (05 Mar 2000) |
| Crampton's line | A line from the apex of the cartilage of the last rib downward and forward nearly to the crest of the ilium, then forward parallel with it to a little below the anterior superior spine; a guide to the common iliac artery. (05 Mar 2000) |
| popliteal line | A ridge which extends obliquely downward and medially across the back of the tibia from the fibular articular facet; it gives origin to the soleus muscle. Synonym: linea musculi solei, line for soleus muscle, linea poplitea, popliteal line. (05 Mar 2000) |
| postaxillary line | A vertical line extending inferiorly from the posterior axillary fold. Synonym: linea axillaris posterior, linea postaxillaris, postaxillary line. (05 Mar 2000) |