Teacup n. : A small cup from which to drink tea.

Example:
How are Teacup chihuahua's different from regular chihuahuas?

Taxonomy
Teacup, cups, free encyclopedia, coffee cups, collectors, small cup, saucers, tea bowl, search, small one, two fingers, en suite, one-of-a-kind, translucent porcelain, Tea bowls, YiXing teapots, articles with unsourced statements, accumulate.

Defination from the web:
teacup is a small cup with a handle, generally a small one that may be grasped with the thumb and one or two fingers. It is typically made of a ceramic material. ... Better teacups typically are of fine white translucent porcelain and can be decorated with floral patterns. They may ...