词根词缀：op-, opt-, optico-, opsi-, opso-, -opia, -ops, -opsia, -opsis, -opsy, -optic, -opic, -opy

【来源及含义】Greek: eye[s]; sight; see, vision

【相关词根词缀】 Related references to "eye" or "eye part" word families: blepharo-; core-; corneo-; eye, eyes; irido-; lenti-, lens-; lenticulo-; ocelli-; oculo-; ophthalmo-; phaco-; pupillo-; retino-; uveo-. Cross references of word families that are related directly, or indirectly, to: "appear, visible, visual, manifest, show, see, reveal, look": blep-; delo-; demonstra-; -orama; pare-; phanero-; phant-; pheno-; scopo-; spec-; vela-, veal-; video-, visuo-.

【同源单词】achromat, achromatopsia, acyanoblepsia, acyanopsia, aeluropsis, aglaucopsia

词根词缀：tri-, tre-

【来源及含义】Greek > Latin: a numerical prefix meaning, three, thrice, threefold; triple; a word element for number 3

【相关词根词缀】 Cross references of word families that are related, partially or totally, to: "three, third": terce-; terti-; trigono-; trito-.

【同源单词】ternary, treble, trebly, triacid, triact, triad

词根词缀：trito-, trit-

【来源及含义】Greek: third; a number which is often used as a prefix

【相关描述】Don't confuse this trit- with another trit- which means "rub, wear away".

【相关词根词缀】 Cross references of word families that are related, partially or totally, to: "three, third": terce-; terti-; tri-, tre; trigono-.

【同源单词】epitrite, tricuspid, tritagonist, tritanomaly, tritanopia, tritaph