词根词缀:centro-, centr-, centri-, kentro-

【来源及含义】Greek > Latin: center; middle point, mid point; focus, focal point, focalize; zero in on

【相关描述】This element originally meant "sharp point, goad" or "spur".

【同源单词】acentric, acentric, acrocentric, allocentric, ambulatory surgery center, amphicentric

词根词缀:costo-, cost-, costi-

【来源及含义】Latin: rib, ribs; side; coast

【同源单词】accost, accosted, acuticostal, chondrocostal, coast, costa