noun🔗Share老茧，胼胝 A hardened area of the skin (especially on the foot or hand) caused by repeated friction, wear or use."After years of playing guitar, he developed calluses on his fingertips. "多年弹吉他后，他的指尖长出了厚厚的茧子。bodymedicinephysiologyChat with AIVocabulary GamePractice Reading
noun🔗Share骨痂，骨赘。 The material of repair in fractures of bone; a substance exuded at the site of fracture, which is at first soft or cartilaginous in consistency, but is ultimately converted into true bone and unites the fragments into a single piece."After his broken arm healed, X-rays showed healthy calluses forming around the fracture, bridging the bone fragments. "他骨折的手臂痊愈后，X光片显示健康的骨痂正在断裂处形成，连接着断裂的骨头碎片。medicinephysiologyanatomybodyChat with AIVocabulary GamePractice Reading
noun🔗Share伤疤组织，愈伤组织 The new formation over the end of a cutting, before it puts out rootlets."The gardener was pleased to see tiny calluses forming on the stems of the rose cuttings, a sign that they would soon develop roots. "园丁很高兴地看到玫瑰插条的茎上长出了细小的愈伤组织，这表明它们很快就会生根。biologyplantagricultureChat with AIVocabulary GamePractice Reading
noun🔗Share额瘤， 骨瘤。 A shining area on the frons of many species of Tabanomorpha (horse flies and relatives)."The entomologist used a magnifying glass to examine the calluses, the shiny spots on the horse fly's face, to help identify the species. "昆虫学家用放大镜检查马蝇脸上的额瘤，也就是那些发光的斑点，以此来帮助鉴别物种。anatomybiologyinsectanimalappearancebodypartscienceChat with AIVocabulary GamePractice Reading
verb🔗Share长茧，生老茧。 To form such hardened tissue."The gardener's hands callused after a summer of digging in the soil. "经过一个夏天的土壤挖掘，园丁的手上长满了老茧.bodymedicineChat with AIVocabulary GamePractice Reading
