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：-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

词根词缀：morpho-, morph-, -morphous, -morphically, -morphia, -morphosis, -morphously, -morphy, -morphic, -morphism

【来源及含义】Greek: shape, form, figure, appearance

【相关描述】The Roman god of sleep is Somnus; so, when we are sleepy, we are "somnolent". Sleep walking is "somnambulism" which in Latin means exactly the same thing; that is, "sleepwalking".

The son of Somnus is Morpheus, the god of dreams, indicating that sleep gives birth to dreams. Morpheus goes back through Latin to the Greek word for "form" or "shape" because dreams are forms and shapes developed in the mind while sleeping.

【相关词根词缀】 Inter-related cross references, directly or indirectly, involving word units dealing with "form, shape, appearance": eido-; figur-; form-; icono-; ideo-; imag-; -oid; typo-.

【同源单词】acrostomorphilia, actinomorphic, actinomorphous, actinomorphy, adelomorphous, aeromorphosis