| midclavicular line | A vertical line passing through the midpoint of the clavicle. Synonym: linea medioclavicularis. (05 Mar 2000) |
|---|---|
| middle axillary line | A vertical line intersecting a point midway between the anterior and posterior axillary folds or lines. Synonym: linea axillaris media, linea medio-axillaris, middle axillary line. (05 Mar 2000) |
| milk line | Bandlike thickening of ectoderm in the embryo extending on either side from just below the axilla to the inguinal region; in human embryos, the mammary glands arise from primordia in the thoracic part of the ridge, the balance of the ridge disappearing; in some lower mammals which give birth to a litter of young, several milk glands develop along these lines. Synonym: mammary fold, milk line, milk ridge. (05 Mar 2000) |
| Clapton's line | A greenish discoloration of the marginal gingiva in cases of chronic copper poisoning. (05 Mar 2000) |
| 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) |