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Noun, pl. lineae 1. Latin for “line.” ( 2. Any long marking, dark or bright, on a planet or moon’s surface. (

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Linea alba

Noun (Dentistry) 1. Term used in dentistry to describe a horizontal streak on the inner surface of the cheek, level with the biting plane. It usually extends from the commissure to the posterior teeth and can extend to the inner lip mucosa and corners of the mouth. It is a common finding and most likely associated with pressure, frictional irritation, or sucking trauma from the facial surfaces of the teeth. It may be found in individuals who chew tobacco, and may be mistaken for a lesion requiring treatment. ( 2. A whitish fibrous band running vertically along the midline of the abdomen, from the umbilicus to the pubis, comprised chiefly of connective tissue.( (Anatomy) 1. A fibrous structure that runs down the midline of the abdomen in humans and other vertebrates. In humans linea alba runs from the xiphoid process to the pubic symphysis. The name means white line and the linea alba is indeed white, being composed mostly of collagen connective tissue. It is formed by the fusion of the aponeuroses of the abdominal muscles, and it separates the left and right rectus abdominis muscles. In muscular individuals its presence can be seen on the skin, forming the depression between the left and right halves of a “six pack.” ( 2. A whitish linear band of tissue slightly elevated on the inside of cheek, resulting from the teeth...

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Linea nigra

Noun 1. A dark vertical line that appears on the abdomen during about three quarters of all pregnancies. The brownish streak is usually about a centimeter in width. The line runs vertically along the midline of the abdomen from the pubis to the umbilicus, but can also run from the pubis to the top of the abdomen. Linea nigra is due to increased melanocyte-stimulating hormone made by the placenta, which also causes melasma and darkened nipples. Fair-skinned women show this phenomenon less often than women with darker pigmentation. ( 2. A dark vertical line running up the abdomen from the pubis to the navel that forms during pregnancy. ( 3. A long narrow dark streak running along the midline of the abdomen, from the umbilicus to the pubis. ( 4. Linea alba that is hyperpigmented temporarily during pregnancy. ( Word origin: Latin for “black...

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Noun, pl. linguae 1. A tongue. ( 2. A median process of the labium, at the underside of the mouth in insects, and serving as a tongue. ( 3. A mobile mass of muscular tissue covered with mucous membrane and located in the oral cavity. ( Syn: tongue, glossa, clapper Word origin: Latin word for...

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Noun 1. Any of several tongue-shaped bony structures, especially that which forms the anterior border of the mandibular foramen. ( Lingula of left lung Sphenoidal lingula Lingula of mandible Lingula of cerebellum 2. (Genus) A brachiopod genus of the family Lingulidae, which is among the few brachiopods surviving today but also known from fossils over 500 million years old. ( Word origin: Diminutive of Latin lingua, hence, a little...

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