12-Letter Words Containing: O,X,T,O,_,_

• Any of various typically yellow-brown dinoflagellates (originally grouped as genus Zooxanthella) now assigned to the genera Symbiodinium and Amphidinium, notably found in coral reefs.

• protrusion of the eyeball from the socket

• the degree to which something is toxic to living cells

• someone who plays a xylophone

• abnormal presence of air in the pleural cavity resulting in the collapse of the lung; may be spontaneous (due to injury to the chest) or induced (as a treatment for tuberculosis)