Accessory fruits
An accessory fruit is a fruit in which accessory tissue makes up most of the fruit. The accessory tissue is often (but not always) receptacle tissue. Some people refer to pomes as accessory fruits. A strawberry is another common example of an accessory fruit.
A strawberry (like the raspberry) comes from a flower with many pistils. In this case, however, the ovaries of the pistils turn into small achenes while the receptacle grows large, fleshy, sweet and red.