Tritriticale was a type of grain descended from triticale. It was a three-lobed genetically-engineered hybrid of wheat and rye, hence the "tri" prefix in its name. Later strains were later engineered throughout the mid-23rd century, including quadro- and quintotriticale. (TOS: "The Trouble with Tribbles"; TAS: "More Tribbles, More Troubles")
In 2259, the USS Enterprise was transporting tritriticale to Setlik II, as it was capable of growing in its biome. They traded their supply of the grain to the Orion Harr Caras for a time portal he had removed from Krulmuth-B. (SNW: "Those Old Scientists")