The dictionary says that the word "mosaic" means a picture or design that is made by placing small colored pieces together.

VOA: special.2009.01.02

Because I thought about it a lot Welles chose that word I guess obviously that frame was a happy picture ? In the word? Why that word?

因为我对这个问题想了很多,为什么威尔斯要选择这个词,我觉得很明显，这个镜头是幸福的,词内涵的深意？还是为什么选这个词？

麻省理工公开课 - 电影哲学课程节选

It's being handed a picture that looks like this, and inside each baz of these squares is a word foo and bar and baz as well as the program's name.

它传递一个像这样的图画，在每个,长方形中是一个单词foo和bar和,还有程序的名字。

哈佛公开课 - 计算机科学课程节选