opalina Share definition Flag A protozoan genus usually found in the intestine of frogs. Also means jewel. Of Sanskrit origin. Protozoa of the genus Opalina are usually commensals with numerous nulclei and numerous cilia. opalina by Touka Chan July 21, 2017 0 0 Get merch Get the opalina mug. Buy Now — $32.95 See more merch