词根词缀：annul-, anul-

【来源及含义】Latin: ring

【同源单词】annular, annuloaortic, annuloplasty, annulus, anular cartilage, anular ligament

词根词缀：-ic

【来源及含义】Greek: a suffix; pertaining to; of the nature of, like; in chemistry, it denotes a higher valence of the element than is expressed by -ous

【同源单词】abdominocystic, abdominopelvic, abdominoscopy, abdominothoracic, abiogenetic, abiogenic