1. pigment consisting of a limonite mixed with clay and silica. 
   由褐铁矿与粘土、硅土混合而成的颜料。
2. a small hard painless nodule at the site of entry of a pathogen (as syphilis). 
   病原体入口处坚硬无痛的节。
3. A nodule or swelling, especially a mass of lymphocytes and epithelioid cells forming the characteristic lesion of tuberculosis. 
   结核节结节或肿瘤，尤指形成典型肿结核损害的堆淋巴球和上皮细胞
4. A yellowish-orange, lipid-filled nodule or papule in the skin, often on an eyelid or over a joint. 
   黄瘤长在皮肤上的一种桔黄色瘤子或丘疹，其中充满油脂。通常长在眼脸或关节上

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