excessive pigmentation

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• Pigmentation — Pig men*ta tion, n. (Physiol.) A deposition, esp. an excessive deposition, of coloring matter; as, pigmentation of the liver. [1913 Webster] …   The Collaborative International Dictionary of English

• Pigmentation — The coloring of the skin, hair, mucous membranes, and retina of the eye. Pigmentation is due to the deposition of melanin which is a coloring matter. The melanin is produced by specialized cells called melanocytes. Other pigmented terms include… …   Medical dictionary

• pigmentation — n. coloration produced in the body by the deposition of one pigment, especially in excessive amounts. Pigmentation may be produced by natural pigments, such as bile pigments (as in jaundice) or melanin, or by foreign material, such as lead or… …   The new mediacal dictionary

• pigmentation — noun Date: 1866 coloration with or deposition of pigment; especially an excessive deposition of bodily pigment …   New Collegiate Dictionary

• pigmentation — n. 1 the natural colouring of plants, animals, etc. 2 the excessive colouring of tissue by the deposition of pigment …   Useful english dictionary

• hyperchromatism — 1. Excessive pigmentation. 2. Increased staining capacity, especially of cell nuclei for hematoxylin. 3. An increase in chromatin in cell nuclei. SYN: hyperchromasia …   Medical dictionary

• melanosis — Abnormal dark brown or brown black pigmentation of various tissues or organs, as the result of melanin or, in some situations, other substances that resemble melanin to varying degrees; e.g., m. of the skin may occur in widespread metastatic… …   Medical dictionary

• chromatosis — chro·ma·to·sis .krō mə tō səs n, pl to·ses .sēz PIGMENTATION specif deposit of pigment in a normally unpigmented area or excessive pigmentation in a normally pigmented site …   Medical dictionary

• Bronzino — Agnolo di Cosimo (November 17, 1503 ndash; November 23,1572), usually known as Il Bronzino, or Agnolo Bronzino (mistaken attempts also have been made in the past to assert his name was Agnolo Tori and even Angelo (Agnolo) Allori ), was an Italian …   Wikipedia

• hyperchromia — SYN: hyperchromatism. macrocytic h. hyperchromatic macrocythemia; a misnomer inasmuch as the red blood cells are larger than normal, the total amount of hemoglobin per cell is increased, but the percentage of hemoglobin per cell is usually in the …   Medical dictionary

• brown induration — 1. a deposit of altered blood pigment in the lung. 2. marked increase of the connective tissue of the lung and excessive pigmentation, due to long continued congestion from heart disease. Cf. gray i …   Medical dictionary