Home › Words › R › rhoptryrhoptryrhoptry · noun — A specialized secretory organelle in some protozoans.Definition from Wiktionary (CC BY-SA 3.0).EtymologyFrom Ancient Greek ῥόπαλον (rhópalon, “club”) or a cognate of it, reflecting the bulbous shape of the organelle.nounA specialized secretory organelle in some protozoansDefinitions & examples from Wiktionary (CC BY-SA 3.0).