恙螨科：此科恙螨分布遍及世界各地，自阿拉斯加和拉布拉多到新西兰，从海平面到海拔16，000以上的安第斯山。幼虫侵染脊椎动物，其中有临床意义的只有恙螨属及其所属真恙螨和纤恙螨二亚属- chaluni
- chalybeate
- chamaecephalic
- chamaecephaly
- chamaeprosopic
- chamaeprosopy
- chamber
- Chamberlen forceps
- chamecephalic
- chamecephaly
- chameprosopic
- chameprosopy
- chancre
- chancriform
- chancroid
- chancroidal
- chancrous
- change
- Ch'ang Shan
- channel
- Ch'an su
- Chantemesse' reaction
- Chaoborus
- Chaos chaos
- Chaoul therapy,tube