"The long march had callused his feet"
"His foot callused"
Their noses were unremarkable, being small and without sufficient callus to give them a definite shape.
Editors have..to develop enormous calluses at every point of contact with authorship.
牛津高階第八版
美國韋氏詞典
Dictionary.com
Free Dictionary
維基百科 (自由的百科全書)