drupelet

Each small unit is called a drupelet.

In an aggregate fruit composed of small, individual drupes, each individual is termed a drupelet.

Do you know what a drupelet is, Mr. Wehling?"

The fruits are bright red, and consist of small clusters of drupelets, sometimes as few as one drupelet per fruit.

Pyrena or pyrene is the name for a nutlet resembling a seed, within a drupe or drupelet.

However, mulberries, which closely resemble blackberries, are not aggregate fruit, but are multiple fruits, actually derived from bunches of catkins, each drupelet thus belonging to a different flower.