1A strongly scented tropical American goosefoot, Chenopodium ambrosioides, used especially in Mexico and the United States to make a refreshing or medicinal drink.
2Any of several other plants of South America or the south-western United States from which beverages or tonics can be made.
Origin
Late 18th century.
Definition of Mexican tea in US English:
Mexican tea
noun
1A strongly scented tropical American goosefoot, Chenopodium ambrosioides, used especially in Mexico and the United States to make a refreshing or medicinal drink.
2Any of several other plants of South America or the south-western United States from which beverages or tonics can be made.