Some words in English use (capital) letters to describe the shape of the object to which they refer:
A-frame, C-clamp, I-beam, O-ring, T-shirt, T-intersection, T-bone, U-turn, V-neck
Chinese seems to have a few words like this (except they make reference to the shape of characters). There are a couple using 十
that are very common:
红十字 -- the Red Cross
十字路口 -- a street intersection
I've also come across one with 丁
and one with 回
:
丁骨牛排 -- a T-bone steak
回形针 -- a paperclip
Are there any other words like this?