词根词缀：dermo-, derm-, derma-, dermato-, dermat-, -derm, -derma, -dermatic, -dermatous, -dermis, -dermal, -dermic, -dermoid, -dermatoid

【来源及含义】Greek: skin

【同源单词】acarine dermatosis, acarodermatitis, achromoderma, achromodermia, acrodermatitis, acrodermatosis

词根词缀：ecto-, ect-

【来源及含义】Greek: outside, external, beyond

【同源单词】ectobiology, ectoblast, ectocardia, ectocytic, ectoderm, ectodermal

词根词缀：ex-, ec-, e-

【来源及含义】Greek: out of, out, outside; away from; used as a prefix

【相关描述】This is a prefix that is supposed to be used with words or roots of Greek origin. The ex- form is used before vowels or h; ec- goes before consonants.

【同源单词】acentric, eccentric, eccentric, eccentric vision, eccentricity, ecclesia