名詞 pigmentation:

1. the deposition of pigment in animals or plants or human beings
2. coloration of living tissues by pigment

1. Loss or removal of normal pigmentation.
   褪色喪失或轉(zhuǎn)移正常的著色
2. An abnormal sensitivity to or intolerance of light, especially by the eyes, as may be caused by eye inflammation, lack of pigmentation in the iris, or various diseases.
   畏光，羞明對光線不正常敏感或無法忍受，尤指由眼引起的，可能是由眼炎、眼球虹彩中缺少色素或其它疾病而引起的
3. Congenital absence of normal pigmentation or coloration in a person, an animal, or a plant.
   白化病人體、動物或植物先天性缺乏正常的色素沉淀或染色

pig.men.ta.tion

n.Biology （名詞）【生物學】
Coloration of tissues by pigment.
上色，染色：色素對組織的著色
Deposition of pigment by cells.
色素沉淀：細胞色素的下沉