词根：melan = black 黑色

  来源于希腊语 melan/melas 黑/黑色,-melano- 为 -melan- 的变体,它相应的拉丁语词根为：-nigri- 黑，来源于拉丁语 niger，如：negro 黑人。

同源词：

1. melanian  [melan 黑，-ian (a.) 形容词后缀，表示“…的”]
  adj.黑色人种的

2. melanosis  [melan,黑，-osis (n.) 名词后缀，表示疾病名称]
  n.黑变病

3. melanotic  [lelan 黑，-otic (a.) 形容词后缀，表示“患…的”]
  adj.患黑变病的

4. melanoma  [melan 黑,-oma (n.) 名词后缀，表示瘤;呈黑色的肿瘤→]
  n.黑瘤

5. melanous  [melan 黑,-ous, 表示...的]
  adj.头发皮肤都是黑色的

6. melanism  [melan 黑，-ism 名词后缀，表示疾病]
  n.黑变病,黑化,黑色素过多

7. melanin  [melan 黑，-in 素]
  n.黑色素

8. melanoid  [melan 黑，-oid 形容词后缀, ...的]
  adj.黑变病的

9. melanuria  [melan 黑，ur 尿，-ia 表示疾病]
  n. 黑尿病

10. Melanesia  [melan 黑→黑人；“黑人居住的岛屿”]
  n.美拉尼亚（西南太平洋的群岛，该岛居民皮肤黑色，故名）

11. Melanesian  [见上，-ian 形容词兼名词后缀]
  n./adj. 美拉尼亚人，美拉尼亚的

12. xanthomelanous  [xantho 黄，melan 黑，-ous ....的]
  adj.（人种）头发黑色皮肤黄色的

词根词缀：vid-, video-, vis-, -vision, -visional, -visionally, visuo-, vu-

【来源及含义】Latin: videre, "to see"; plus words with other related meanings: to notice, noticing, noticed; observe, observing, observed; look, looking, looked; perceive, perceiving, perceived, perception; see, seeing, saw, seen, sight; view, viewing, viewed; manifest, manifesting, manifested; reveal, revealing, revealed, revelelation

【相关描述】Although many of the words in this unit seem to be from other Latin origins, all of them are etymologically derived from the main Latin videre, "to see" element.

【相关词根词缀】 Cross references of word families that are related directly, or indirectly, to: "appear, visible, visual, manifest, show, see, reveal, look": blep-; delo-; demonstra-; opt-; -orama; pare-; phanero-; phant-; pheno-; scopo-; spec-; vela-, veal-.

【同源单词】achromatic vision, advice, advisability, advisable, advisableness, advisably