smegma

noun

1. 阴垢；（尤指）包皮垢
   a substance produced in the folds of the skin, especially under the foreskin

1. Objectives: To ascertain the incidence of balanoposthitis, smegma and human papillomavirus in circumcised foreskin of different ages.
   目的：探讨不同年龄包皮环切后人群包皮中包皮龟头炎、包皮垢及人乳头瘤病毒（HPV）感染的发生率。
2. Results: The positive rate of HPV DNA was 41.7% ( 20/ 48) and there were no significant difference on HPV infection in different groups of age, smegma and history of balanoposthitis.
   结果：48例中，20例阳性，阳性率为41.7%；其中不同年龄段、有无包皮垢及有无感染史组间HPV阳性率均无显著性差异。

noun

1. a white secretion of the sebaceous glands of the foreskin