名词象形文字; 难以辨认或理解的文字; 象形文字，象形文字写成的文章( hieroglyphic的名词复数 )

1. （尤指古埃及的）象形字，象形符号
Hieroglyphics are symbols in the form of pictures which are used in some writing systems, for example those of ancient Egypt.

2. 难辨认的文字（或符号）;难懂的文字（或符号）
You can use hieroglyphics to refer to something that has been written, but that you cannot understand.

e.g. I've never come across hieroglyphics like the handwriting of Peter Smallwood.
我从未见过像彼得·斯莫尔伍德那么难辨认的笔迹。