响尾蛇科：毒蛇之一科，有可活动的前沟毒牙，鼻孔与眼之间有隐窝。包括以下几属：蝮蛇属(Agkistrodon)(铜头蛇和水栖噬鱼蝮蛇)，具窍蝮蛇属(Bothrops)(矛头蛇)，响尾蛇属(crotalus)(响尾蛇)，饭匙倩属(Lachesis)(南美大毒蛇丛林王)，竹叶青属(Trimeresurus)(饭匙倩)- choroidal
- choroidea
- choroidectomy
- choroideremia
- choroiditis
- choroidocyclitis
- choroidoiritis
- choroidopathy
- choroidoretinitis
- chorology
- choromania
- chortosterol
- Chr.
- Christian' s disease(syndrome)
- Christian-Weber disease
- Christmas disease,factor
- Christ-Siemens-Touraine syndrome
- chrom-
- chromaffin
- chromaffinity
- chromaffinoma
- chromaffinopathy
- chromaphil
- chromargentaffin
- chromate