A coffee seed, commonly called coffee bean, is a seed of the coffee plant, and is the source for coffee. It is the pit inside the red or purple fruit often referred to as a cherry. Just like ordinary cherries, the coffee fruit is also a so-called stone fruit. Even though the coffee beans are seeds, they are referred to as "beans" because of their resemblance to true beans. The fruits – coffee cherries or coffee berries – most commonly contain two stones with their flat sides together. A small percentage of cherries contain a single seed, instead of the usual two. This is called a "peaberry". The peaberry occurs only between 10 and 15% of the time, and it is a fairly common (yet scientifically unproven) belief that they have more flavour than normal coffee beans.[1] like brazil nuts (a seed) and white rice, coffee beans consist mostly of endosperm.[2] the two most economically important varieties of coffee plant are the arabica and the robusta; 75–80% of the coffee produced worldwide is arabica and 20% is robusta.[2] arabica beans consist of 0.8–1.4% caffeine and robusta beans consist of 1.7–4% caffeine.[3] as coffee is one of the world's most widely consumed beverages, coffee beans are a major cash crop and an important export product, counting for over 50% of some developing nations' foreign exchange earnings.

A coffee seed, commonly called coffee bean, is a seed of the coffee plant, and is the source for coffee. It is the pit inside the red or purple fruit often referred to as a cherry. Just like ordinary cherries, the coffee fruit is also a so-called stone fruit. Even though the coffee beans are seeds, they are referred to as "beans" because of their resemblance to true beans. The fruits – coffee cherries or coffee berries – most commonly contain two stones with their flat sides together. A small percentage of cherries contain a single seed, instead of the usual two. This is called a "peaberry". The peaberry occurs only between 10 and 15% of the time, and it is a fairly common (yet scientifically unproven) belief that they have more flavour than normal coffee beans.[1] like brazil nuts (a seed) and white rice, coffee beans consist mostly of endosperm.[2] the two most economically important varieties of coffee plant are the arabica and the robusta; 75–80% of the coffee produced worldwide is arabica and 20% is robusta.[2] arabica beans consist of 0.8–1.4% caffeine and robusta beans consist of 1.7–4% caffeine.[3] as coffee is one of the world's most widely consumed beverages, coffee beans are a major cash crop and an important export product, counting for over 50% of some developing nations' foreign exchange earnings.