A Conical Strainer is a strainer that is used for straining and filtering out impurities from foods such as soups, stock and sauces.
The Conical Strainer is a cone shaped strainer.
Colander and a Sieve are the same thing essentially.
However the main difference between a Colander and a Sieve is that the Colander is a bowl shaped Sieve which is also a strainer.
A Sieve can also be a Colander but a Sieve refers to a device that is used to separate larger objects from smaller objects, or to separate solid objects from a liquid.
A Colander and a Strainer are essentially the same exact thing.
The only real difference though between a Colander and a Strainer is that the Colander is a larger bowl shaped strainer that looks like a bowl but has holes in it to drain water off of foods.
The strainer can also be a bowl shaped strainer but usually they are smaller than a Colander.
Strainer can be used to name a few different strainer type utensils for cooking or just draining things.
Another common word for Colander is Strainer.
A Colander and a Strainer are basically the same thing but with different names.
Other words for Colander are Sieve, Screen and Filter.