餃 is descended from 角, which is corner or horn, which is also used to name some dumplings (although more often baked or deep-fried instead of steamed or boiled).
In Mandarin, 餃 is suffixed with 子, which generally denotes small things or offspring (the character resembles a baby with its arms spread).
Chinese dumplings, typically steamed, boiled, or pan-fried.