【医】 Huygen's ocular; Huygens' ocular
benefit; favour; kindness
base; cause; foot; origin; radix; root; source
【化】 radical
【医】 rad.; radical; radices; radix; rhizo-; root
family name; surname
ocular
【化】 eyepiece
【医】 eye lens; eyepiece; ocular; ocular lens