词根词缀：medico-, medic-, medi-, med-

【来源及含义】Latin: heal, cure; physician

【相关词根词缀】Medicine is the discipline that is concerned with the preservation of health and the diagnosis and treatment of human disabilities.

【同源单词】aeromedicine, agromed, alopecia medicamentosa, biomedical, biomedical engineering, biomedicine

词根词缀：pre-, prae-

【来源及含义】Latin: before [both in time and place]

【相关描述】The prefix prae- can actually be substituted for pre- because both of them are different spellings for the same prefix meaning "before".

【相关词根词缀】 Related before-word units: ante-; antero-; anti-; pro-. Related "time" units: aevum, evum; archaeo-, archeo-; Calendars; chrono-; horo-; Quotes: Time; tempo-.

【同源单词】preacquaint, preacquaintance, preagonal, pre-agricultural, preamble, preambular