aggregate fruit

from The American Heritage® Dictionary of the English Language, 5th Edition.

• noun A fruit, such as a raspberry, consisting of many individual small fruits derived from separate ovaries within a single flower, borne together on a common receptacle.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun botany A fruit that develops from the fusion of more than one carpel within a single flower, as for instance, a raspberry.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• noun fruit consisting of many individual small fruits or drupes derived from separate ovaries within a common receptacle: e.g. blackberry; raspberry; pineapple