nounpl. et·rogs also et·ro·gim
- A western Asian tree (Citrus medica var. etrog) having white flowers and sour yellow fruit.
- The fruit of this tree, used ceremonially in the Jewish festival of Sukkot.
Origin of etrogAramaic and Mishnaic Hebrew ’etr&omacron;g, from Middle Persian wadrang, citron; akin to Sankrit ma&tlowdot;ulu&ndot;gam, from a source akin to Tamil mata&llowdot;ai, matu&llowdot;ai and Malayalam matalam.