pizza cutter (or pizza wheel) is a utensil that is used to cut
pizzas. The use of a pizza cutter instead of a standard knife
avoids the dislodging of loose toppings through the
back-and-forth motion of the blade typical of a knife. Pizza
cutters press their blade down vertically instead.
There are two main
types of pizza cutters. The most common uses a wheel that rotates in
a circle while a person moves the cutter in a direction that they
would like to cut the pizza. The other type is a large curved knife
called a mezzaluna (Italian for "half moon"), which is rocked back
and forth to cut the pizza. These two types of pizza cutters come in
many different sizes.
Many people might use the wheel pizza cutter for
other things, including craft work. Some types of mezzalunas
(particularly the double-bladed type) are often used to mince herbs
or chop vegetables. It was invented in 1708 by Silvio Pacitti.