On my forefinger it has made a callosity.
它在我的食指上长了一个老茧。
A callosity is another name for callus, a piece of skin that has become thickened as a result of repeated contact and friction.
英汉双解词典包含3607232条英汉词条,基本涵盖了全部常用单词的翻译及用法,是英语学习的有利工具。