Kathirikkai in English is a form of Egg plant. In India it is commonly called as Brinjal. They come in different forms and colors based on the region it is cultivated. Check out more varieties here.
Kathirikkai pieces are used to make Kathirikkai Sambar or Kuzhambu. Kathirikkai can also be used to make poriyal.
Popular dish where Kathirikkai is used:
As a main vegetable ingredient in Sambar or Kuzhambu or Korma.
Spelling variations in Tamil name for Egg plant:
Kathirikkai, kathiri kai
More images of Egg plant: