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 a summer of gardening, she had a thick callus on her palm from gripping the shovel. "一个夏天都在园艺劳作后，她握铲子的手掌上磨出了一层厚厚的老茧。bodymedicinephysiologyanatomyconditionChat with AIVocabulary GamePractice Reading
noun🔗Share骨痂 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."The doctor explained that the callus in Sarah's broken arm was healing well, and the fragments were slowly uniting. "医生解释说，莎拉骨折的手臂上的骨痂愈合情况良好，骨头碎片正在慢慢地连接在一起。medicinephysiologyanatomybodybiologysciencesubstanceChat with AIVocabulary GamePractice Reading
noun🔗Share愈伤组织 The new formation over the end of a cutting, before it puts out rootlets."The gardener carefully examined the cutting, noting the developing callus before planting it. "园丁仔细检查了扦插的枝条，注意到在种植前正在形成的愈伤组织。plantbiologyagricultureChat with AIVocabulary GamePractice Reading
noun🔗Share额瘤， 亮斑 A shining area on the frons of many species of Tabanomorpha (horse flies and relatives)."The horse fly's callus shone brightly under the afternoon sun. "下午的阳光下，那只马蝇额头上的额瘤（亮斑）闪闪发光。anatomyinsectbiologyanimalChat with AIVocabulary GamePractice Reading
verb🔗Share起茧，生茧。 To form such hardened tissue.""After gardening all summer, my hands started to callus." "整个夏天都在园艺劳作后，我的手上开始起茧子了。bodyphysiologymedicineChat with AIVocabulary GamePractice Reading
