以下是关于单词 callus 的详细百科式说明：

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单词：callus

音标：英 /ˈkæl.əs/ 美 /ˈkæl.əs/

词性：名词；动词

基本释义：

名词
（1）皮肤的老茧，厚硬的角质层
（2）骨痂，骨愈合过程中形成的硬组织

动词
（1）使（皮肤）长茧，使硬化
（2）使（感情、态度）变得麻木或坚硬

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词性扩展：

名词：可数 /callus, calluses/

动词：callused, callusing

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用法说明：

描述手脚因长期摩擦而形成的厚硬皮肤：His hands developed a callus from years of manual labor.

医学用语中指骨愈合过程中的硬化组织：The X-ray showed a callus forming around the fractured bone.

引申义用于形容情感麻木或心理坚硬：Years of hardship had callused her heart.

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短语搭配：

develop a callus 形成老茧

thick callus 厚茧

corn and callus 鸡眼和老茧

callus formation 骨痂形成

callus on the heel 脚跟的老茧

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例句：

After months of guitar practice, he had a callus on his fingertips.

The carpenter’s hands were covered in calluses.

A callus formed over the old wound.

The doctor examined the callus on his broken bone.

Runners often get calluses on their feet.

She tried to soften the callus on her palm.

Hard work has callused his hands and heart.

The callus on the ball of her foot made walking uncomfortable.

Callus formation is a natural part of bone healing.

You should moisturize to prevent calluses from cracking.

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如果你需要，我可以再整理一份 callus 的常见搭配和近义词对比表，方便学习和记忆。你希望我整理吗？