词根词缀：di-, dicho-, dich-

【来源及含义】Greek: number two; twice, divided, double; unalike; a number used as a prefix

【同源单词】diacanthous, diacid, diadelphous, dianthous, diarch, diarchy

词根词缀：-petalous

【来源及含义】Greek: in botany, a suffix combining form meaning, "having a certain number or a certain shape of petals"

【同源单词】andropetalous, anisopetalous, apetalous, dipetalous, enneapetalous, monopetalous