- an aggregate fruit, as one consisting of drupes (raspberry) or achenes (traveller's joy)
C19: from French etairion, from Greek hetaireia association
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
Examples from the Web for etaerio
In the raspberry and bramble several small drupes or drupels are aggregated so as to constitute an etaerio.